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Finding the Fourth Proportional to 87,545.78, 131,318.66 and 87,545.78

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Solution

The fourth proportional to 87,545.78, 131,318.66 and 87,545.78 is: 131,318.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,545.78 : 131,318.66 = 87,545.78 : x
  2. Step 2: Convert to fraction form
    87,545.78/131,318.66 = 87,545.78/x
  3. Step 3: Cross multiply
    87,545.78x = 131,318.66 × 87,545.78
  4. Step 4: Simplify right side
    87,545.78x = 11,496,394,080.53
  5. Step 5: Solve for x
    x = 11,496,394,080.53/87,545.78
  6. Step 6: Final answer
    x = 131,318.66

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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.