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Finding the Fourth Proportional to 87,615.80, 131,469.60 and 40,245.20

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Solution

The fourth proportional to 87,615.80, 131,469.60 and 40,245.20 is: 60,388.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,615.80 : 131,469.60 = 40,245.20 : x
  2. Step 2: Convert to fraction form
    87,615.80/131,469.60 = 40,245.20/x
  3. Step 3: Cross multiply
    87,615.80x = 131,469.60 × 40,245.20
  4. Step 4: Simplify right side
    87,615.80x = 5,291,020,345.92
  5. Step 5: Solve for x
    x = 5,291,020,345.92/87,615.80
  6. Step 6: Final answer
    x = 60,388.88

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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.