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Finding the Fourth Proportional to 87,961.70, 131,694.15 and 68,467.70

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Solution

The fourth proportional to 87,961.70, 131,694.15 and 68,467.70 is: 102,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,961.70 : 131,694.15 = 68,467.70 : x
  2. Step 2: Convert to fraction form
    87,961.70/131,694.15 = 68,467.70/x
  3. Step 3: Cross multiply
    87,961.70x = 131,694.15 × 68,467.70
  4. Step 4: Simplify right side
    87,961.70x = 9,016,795,553.96
  5. Step 5: Solve for x
    x = 9,016,795,553.96/87,961.70
  6. Step 6: Final answer
    x = 102,508.20

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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.