Solve for t 66000 times 1.01125 raised to 4t equals 200000?

Answer 1

Assuming I read this right:

66000 x 1.011254t = 200000

1.011254t = 200000 / 66000 = 100/33

taking logs of both sides

4t log 1.01125 = log(100/33)

t = log(100/33) / (4 x log 1.01125)

Logs used can be any base, but must be the same base:

t ~= 24.77527