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Finding the Fourth Proportional to 87,496.80, 131,245.20 and 79,720.80

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Solution

The fourth proportional to 87,496.80, 131,245.20 and 79,720.80 is: 119,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,496.80 : 131,245.20 = 79,720.80 : x
  2. Step 2: Convert to fraction form
    87,496.80/131,245.20 = 79,720.80/x
  3. Step 3: Cross multiply
    87,496.80x = 131,245.20 × 79,720.80
  4. Step 4: Simplify right side
    87,496.80x = 10,462,972,340.16
  5. Step 5: Solve for x
    x = 10,462,972,340.16/87,496.80
  6. Step 6: Final answer
    x = 119,581.20

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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.