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Finding the Fourth Proportional to 87,787.20, 131,680.80 and 22,123.20

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Solution

The fourth proportional to 87,787.20, 131,680.80 and 22,123.20 is: 33,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,787.20 : 131,680.80 = 22,123.20 : x
  2. Step 2: Convert to fraction form
    87,787.20/131,680.80 = 22,123.20/x
  3. Step 3: Cross multiply
    87,787.20x = 131,680.80 × 22,123.20
  4. Step 4: Simplify right side
    87,787.20x = 2,913,200,674.56
  5. Step 5: Solve for x
    x = 2,913,200,674.56/87,787.20
  6. Step 6: Final answer
    x = 33,184.80

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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.