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Ben saved 3/4 as much each month as he saved the month before and he saved $45 in march how much did he save in the January before?

Ben saved 3/4 as much each month as he saved the month before and he saved $45 in March, how much did he save the January before? 
 
I thought it would be $30 in February and $10 in January, is this correct?

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Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
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Let x be the amount saved in the January.
x(3/4)^2 = 45
x = $80 <==Answer
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Attn: Each month Ben saved less than the previous month he did. In Februray, he saved 80(3/4) = $60, and in March he saved 60(3/4) = $45.