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Finding the Fourth Proportional to 87,892.80, 131,825.70 and 28,728.78

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Solution

The fourth proportional to 87,892.80, 131,825.70 and 28,728.78 is: 43,088.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,892.80 : 131,825.70 = 28,728.78 : x
  2. Step 2: Convert to fraction form
    87,892.80/131,825.70 = 28,728.78/x
  3. Step 3: Cross multiply
    87,892.80x = 131,825.70 × 28,728.78
  4. Step 4: Simplify right side
    87,892.80x = 3,787,191,533.65
  5. Step 5: Solve for x
    x = 3,787,191,533.65/87,892.80
  6. Step 6: Final answer
    x = 43,088.76

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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.