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Finding the Fourth Proportional to 87,771.40, 131,677.90 and 28,607.40

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Solution

The fourth proportional to 87,771.40, 131,677.90 and 28,607.40 is: 42,917.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,771.40 : 131,677.90 = 28,607.40 : x
  2. Step 2: Convert to fraction form
    87,771.40/131,677.90 = 28,607.40/x
  3. Step 3: Cross multiply
    87,771.40x = 131,677.90 × 28,607.40
  4. Step 4: Simplify right side
    87,771.40x = 3,766,962,356.46
  5. Step 5: Solve for x
    x = 3,766,962,356.46/87,771.40
  6. Step 6: Final answer
    x = 42,917.88

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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.