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Finding the Fourth Proportional to 276,711.60, 415,067.40 and 87,195.90

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Solution

The fourth proportional to 276,711.60, 415,067.40 and 87,195.90 is: 130,793.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,711.60 : 415,067.40 = 87,195.90 : x
  2. Step 2: Convert to fraction form
    276,711.60/415,067.40 = 87,195.90/x
  3. Step 3: Cross multiply
    276,711.60x = 415,067.40 × 87,195.90
  4. Step 4: Simplify right side
    276,711.60x = 36,192,175,503.66
  5. Step 5: Solve for x
    x = 36,192,175,503.66/276,711.60
  6. Step 6: Final answer
    x = 130,793.85

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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.