Finding the Fourth Proportional to 71,639.91, 107,385.12 and 40,003.59
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Solution
The fourth proportional to 71,639.91, 107,385.12 and 40,003.59 is: 59,963.65
Step by Step Solution
- Step 1: Write the proportion equation
71,639.91 : 107,385.12 = 40,003.59 : x - Step 2: Convert to fraction form
71,639.91/107,385.12 = 40,003.59/x - Step 3: Cross multiply
71,639.91x = 107,385.12 × 40,003.59 - Step 4: Simplify right side
71,639.91x = 4,295,790,312.58 - Step 5: Solve for x
x = 4,295,790,312.58/71,639.91 - Step 6: Final answer
x = 59,963.65
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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.