Finding the Fourth Proportional to 129,007.86, 178,035.26 and 71,648.08
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Solution
The fourth proportional to 129,007.86, 178,035.26 and 71,648.08 is: 98,876.80
Step by Step Solution
- Step 1: Write the proportion equation
129,007.86 : 178,035.26 = 71,648.08 : x - Step 2: Convert to fraction form
129,007.86/178,035.26 = 71,648.08/x - Step 3: Cross multiply
129,007.86x = 178,035.26 × 71,648.08 - Step 4: Simplify right side
129,007.86x = 12,755,884,551.30 - Step 5: Solve for x
x = 12,755,884,551.30/129,007.86 - Step 6: Final answer
x = 98,876.80
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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.