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Finding the Fourth Proportional to 87,806.60, 131,321.10 and 73,809.80

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Solution

The fourth proportional to 87,806.60, 131,321.10 and 73,809.80 is: 110,387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,806.60 : 131,321.10 = 73,809.80 : x
  2. Step 2: Convert to fraction form
    87,806.60/131,321.10 = 73,809.80/x
  3. Step 3: Cross multiply
    87,806.60x = 131,321.10 × 73,809.80
  4. Step 4: Simplify right side
    87,806.60x = 9,692,784,126.78
  5. Step 5: Solve for x
    x = 9,692,784,126.78/87,806.60
  6. Step 6: Final answer
    x = 110,387.88

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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.