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Finding the Fourth Proportional to 125,213.66, 172,761.21 and 71,487.98

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Solution

The fourth proportional to 125,213.66, 172,761.21 and 71,487.98 is: 98,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,213.66 : 172,761.21 = 71,487.98 : x
  2. Step 2: Convert to fraction form
    125,213.66/172,761.21 = 71,487.98/x
  3. Step 3: Cross multiply
    125,213.66x = 172,761.21 × 71,487.98
  4. Step 4: Simplify right side
    125,213.66x = 12,350,349,061.45
  5. Step 5: Solve for x
    x = 12,350,349,061.45/125,213.66
  6. Step 6: Final answer
    x = 98,634.20

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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.