Finding the Fourth Proportional to 84,122.96, 126,221.49 and 39,781.53
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Solution
The fourth proportional to 84,122.96, 126,221.49 and 39,781.53 is: 59,689.82
Step by Step Solution
- Step 1: Write the proportion equation
84,122.96 : 126,221.49 = 39,781.53 : x - Step 2: Convert to fraction form
84,122.96/126,221.49 = 39,781.53/x - Step 3: Cross multiply
84,122.96x = 126,221.49 × 39,781.53 - Step 4: Simplify right side
84,122.96x = 5,021,283,991.08 - Step 5: Solve for x
x = 5,021,283,991.08/84,122.96 - Step 6: Final answer
x = 59,689.82
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.