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Finding the Fourth Proportional to 87,145.20, 130,717.80 and 67,437.90

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Solution

The fourth proportional to 87,145.20, 130,717.80 and 67,437.90 is: 101,156.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,145.20 : 130,717.80 = 67,437.90 : x
  2. Step 2: Convert to fraction form
    87,145.20/130,717.80 = 67,437.90/x
  3. Step 3: Cross multiply
    87,145.20x = 130,717.80 × 67,437.90
  4. Step 4: Simplify right side
    87,145.20x = 8,815,333,924.62
  5. Step 5: Solve for x
    x = 8,815,333,924.62/87,145.20
  6. Step 6: Final answer
    x = 101,156.85

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1.5x scale

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.