Solving the TVM equation for the interest rate

02132020, 10:42 AM
(This post was last modified: 02132020 10:46 AM by Gamo.)
Post: #25




RE: Solving the TVM equation for the interest rate
From HP55 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 HP55 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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