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Finding the Fourth Proportional to 87,614.80, 131,422.20 and 72,062.80

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Solution

The fourth proportional to 87,614.80, 131,422.20 and 72,062.80 is: 108,094.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,614.80 : 131,422.20 = 72,062.80 : x
  2. Step 2: Convert to fraction form
    87,614.80/131,422.20 = 72,062.80/x
  3. Step 3: Cross multiply
    87,614.80x = 131,422.20 × 72,062.80
  4. Step 4: Simplify right side
    87,614.80x = 9,470,651,714.16
  5. Step 5: Solve for x
    x = 9,470,651,714.16/87,614.80
  6. Step 6: Final answer
    x = 108,094.20

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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.