Solving the TVM equation for the interest rate
02-13-2020, 10:42 AM (This post was last modified: 02-13-2020 10:46 AM by Gamo.)
Post: #25
 Gamo Senior Member Posts: 711 Joined: Dec 2016
RE: Solving the TVM equation for the interest rate
From HP-55 Mathematics Programs

The Suggested Guess for

1. Direct Reduction Loan Interest Rate with known [n, PV and PMT]
2. Sinking Fund Interest Rate with known [n, FV and PMT]

To find the guess the HP-55 programs book used these formulas.

1. Direct Reduction Loan Interest Rate

[1 / (PV / PMT)] - [(1 / n^2) x (PV / PMT)]

2. Sinking Fund Interest Rate

[((FV/PMT) - n) x 2] ÷ [(n - 1)^2 + (FV/PMT)]

Gamo 2/2020
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 Messages In This Thread Solving the TVM equation for the interest rate - Dieter - 04-15-2018, 08:39 AM RE: Solving the TVM equation for the interest rate - Gamo - 04-15-2018, 10:46 AM RE: Solving the TVM equation for the interest rate - Dieter - 04-15-2018, 02:55 PM RE: Solving the TVM equation for the interest rate - Ángel Martin - 04-15-2018, 04:37 PM RE: Solving the TVM equation for the interest rate - ttw - 04-16-2018, 05:00 AM RE: Solving the TVM equation for the interest rate - Carsen - 04-15-2018, 05:30 PM RE: Solving the TVM equation for the interest rate - Dieter - 04-15-2018, 06:08 PM RE: Solving the TVM equation for the interest rate - Csaba Tizedes - 02-17-2020, 10:30 AM RE: Solving the TVM equation for the interest rate - Carsen - 04-15-2018, 08:48 PM RE: Solving the TVM equation for the interest rate - Dieter - 04-15-2018, 09:38 PM RE: Solving the TVM equation for the interest rate - Dieter - 04-16-2018, 06:34 PM RE: Solving the TVM equation for the interest rate - Jeff_Kearns - 04-19-2018, 02:56 PM RE: Solving the TVM equation for the interest rate - Dieter - 04-19-2018, 09:45 PM RE: Solving the TVM equation for the interest rate - Erwin - 02-13-2020, 06:00 AM RE: Solving the TVM equation for the interest rate - Albert Chan - 12-05-2020, 04:31 PM RE: Solving the TVM equation for the interest rate - AndiGer - 04-16-2018, 03:44 AM RE: Solving the TVM equation for the interest rate - Gamo - 04-17-2018, 08:59 AM RE: Solving the TVM equation for the interest rate - Dieter - 04-17-2018, 06:50 PM RE: Solving the TVM equation for the interest rate - Gamo - 02-12-2020, 10:50 AM RE: Solving the TVM equation for the interest rate - Albert Chan - 02-12-2020, 12:31 PM RE: Solving the TVM equation for the interest rate - ttw - 02-12-2020, 03:41 PM RE: Solving the TVM equation for the interest rate - Albert Chan - 02-12-2020, 05:25 PM RE: Solving the TVM equation for the interest rate - ttw - 02-12-2020, 09:37 PM RE: Solving the TVM equation for the interest rate - Albert Chan - 02-12-2020, 11:40 PM RE: Solving the TVM equation for the interest rate - ttw - 02-12-2020, 09:54 PM RE: Solving the TVM equation for the interest rate - Gamo - 02-13-2020, 06:30 AM RE: Solving the TVM equation for the interest rate - Gamo - 02-13-2020 10:42 AM

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