The amount of interest earned on savings is directionally proportional to the amount of money saved. If $87.50 interest is earned on $2,500 of savings, how much interest will be earned on $3,500 of savings over the same time period?

A.

$105.00

B.

$122.50

C.

$140.00

D.

$157.50

Question

The amount of interest earned on savings is directionally proportional to the amount of money saved. If $87.50 interest is earned on $2,500 of savings, how much interest will be earned on $3,500 of savings over the same time period?
  
 
 

 
 

  

  A. 
 
$105.00
   
   

 
 

  

  B. 
 
$122.50
  
   

 
 

  

  C. 
 
$140.00
  
   

 
 

  

  D. 
 
$157.50

texaschic101 · Answer

87.50 / 2500 = x/3500 --- (87.50 to 2500 = x to 3500)
cross multiply
2500x = (3500)(87.50)
2500x = 306250
x = 306250/2500
x = 122.50 (B)