This will solve for the periodic interest rate given the N, FV, and PMT
components of the Time Value of Money equation. This program deals with
problems that have a future value in them rather than a present value.
Remember: The periodic interest rate is NOT the annual rate. For TVM problems involving a present value, see: SR-56 Present Values
Instructions:
1) Clear memories. 2nd Cms.
2) Load known values (you need to enter three of these) into data
memories. Future Value STO 2, Payment per period, STO 3, Number of
periods STO 4.
3) Calculate the periodic interest rate by pressing RST, R/S. The rate
is automatically calculated and displayed.
Line Keycode Instruction 00 56 CP 01 15 CLR 02 34 RCL 03 02 2 04 54 / 05 34 RCL 06 03 3 07 54 / 08 33 STO 09 05 5 10 34 RCL 11 04 4 12 43 X^2 13 74 - 14 34 RCL 15 05 5 16 20 1/X 17 94 = 18 37 X = T 19 09 9 20 02 2 21 33 STO 22 01 1 23 52 ( 24 01 1 25 84 + 26 34 RCL 27 01 1 28 53 ) 29 45 Y^X 30 34 RCL 31 04 4 32 74 - 33 01 1 34 74 - 35 33 STO 36 06 6 37 34 RCL 38 01 1 39 64 * 40 34 RCL 41 05 5 42 94 = 43 54 / 44 52 ( 45 34 RCL 46 06 6 47 54 / 48 34 RCL 49 01 1 50 93 +/- 51 84 + 52 34 RCL 53 04 4 54 64 * 55 52 ( 56 01 1 57 84 + 58 34 RCL 59 01 1 60 53 ) 61 45 Y^X 62 52 ( 63 34 RCL 64 04 4 65 74 - 66 01 1 67 94 = 68 12 INV 69 35 SUM 70 01 1 71 28 | X | 72 74 - 73 04 7 74 93 +/- 75 19 10^X 76 94 = 77 47 X >= T 78 02 2 79 03 3 80 34 RCL 81 01 1 82 49 FIX 83 06 6 84 44 EE 85 12 INV 86 44 EE 87 33 STO 88 01 1 89 64 * 90 02 2 91 19 10^X 92 49 FIX 93 02 2 94 94 = 95 41 R/S 96 42 RST