Finding the Fourth Proportional to 117,201.76, 161,728.81 and 66,218.92
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Solution
The fourth proportional to 117,201.76, 161,728.81 and 66,218.92 is: 91,376.67
Step by Step Solution
- Step 1: Write the proportion equation
117,201.76 : 161,728.81 = 66,218.92 : x - Step 2: Convert to fraction form
117,201.76/161,728.81 = 66,218.92/x - Step 3: Cross multiply
117,201.76x = 161,728.81 × 66,218.92 - Step 4: Simplify right side
117,201.76x = 10,709,506,561.22 - Step 5: Solve for x
x = 10,709,506,561.22/117,201.76 - Step 6: Final answer
x = 91,376.67
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.