Home / 87,830.18-131,876.49-86,517.98

Finding the Fourth Proportional to 87,830.18, 131,876.49 and 86,517.98

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Solution

The fourth proportional to 87,830.18, 131,876.49 and 86,517.98 is: 129,906.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,830.18 : 131,876.49 = 86,517.98 : x
  2. Step 2: Convert to fraction form
    87,830.18/131,876.49 = 86,517.98/x
  3. Step 3: Cross multiply
    87,830.18x = 131,876.49 × 86,517.98
  4. Step 4: Simplify right side
    87,830.18x = 11,409,687,524.29
  5. Step 5: Solve for x
    x = 11,409,687,524.29/87,830.18
  6. Step 6: Final answer
    x = 129,906.23

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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.