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Finding the Fourth Proportional to 87,605.20, 131,440.20 and 28,442.80

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Solution

The fourth proportional to 87,605.20, 131,440.20 and 28,442.80 is: 42,674.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,605.20 : 131,440.20 = 28,442.80 : x
  2. Step 2: Convert to fraction form
    87,605.20/131,440.20 = 28,442.80/x
  3. Step 3: Cross multiply
    87,605.20x = 131,440.20 × 28,442.80
  4. Step 4: Simplify right side
    87,605.20x = 3,738,527,320.56
  5. Step 5: Solve for x
    x = 3,738,527,320.56/87,605.20
  6. Step 6: Final answer
    x = 42,674.72

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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.