Finding the Fourth Proportional to 125,138.18, 172,648.42 and 71,385.36
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Solution
The fourth proportional to 125,138.18, 172,648.42 and 71,385.36 is: 98,487.68
Step by Step Solution
- Step 1: Write the proportion equation
125,138.18 : 172,648.42 = 71,385.36 : x - Step 2: Convert to fraction form
125,138.18/172,648.42 = 71,385.36/x - Step 3: Cross multiply
125,138.18x = 172,648.42 × 71,385.36 - Step 4: Simplify right side
125,138.18x = 12,324,569,615.13 - Step 5: Solve for x
x = 12,324,569,615.13/125,138.18 - Step 6: Final answer
x = 98,487.68
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1.5x scale
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.