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Finding the Fourth Proportional to 87,980.53, 131,950.42 and 52,451.80

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Solution

The fourth proportional to 87,980.53, 131,950.42 and 52,451.80 is: 78,665.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,980.53 : 131,950.42 = 52,451.80 : x
  2. Step 2: Convert to fraction form
    87,980.53/131,950.42 = 52,451.80/x
  3. Step 3: Cross multiply
    87,980.53x = 131,950.42 × 52,451.80
  4. Step 4: Simplify right side
    87,980.53x = 6,921,037,320.97
  5. Step 5: Solve for x
    x = 6,921,037,320.97/87,980.53
  6. Step 6: Final answer
    x = 78,665.56

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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.