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Finding the Fourth Proportional to 138,562.17, 207,438.43 and 125,265.89

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Solution

The fourth proportional to 138,562.17, 207,438.43 and 125,265.89 is: 187,532.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,562.17 : 207,438.43 = 125,265.89 : x
  2. Step 2: Convert to fraction form
    138,562.17/207,438.43 = 125,265.89/x
  3. Step 3: Cross multiply
    138,562.17x = 207,438.43 × 125,265.89
  4. Step 4: Simplify right side
    138,562.17x = 25,984,960,170.61
  5. Step 5: Solve for x
    x = 25,984,960,170.61/138,562.17
  6. Step 6: Final answer
    x = 187,532.86

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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.