Home / 87,691.26-120,984.33-49,938.78

Finding the Fourth Proportional to 87,691.26, 120,984.33 and 49,938.78

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Solution

The fourth proportional to 87,691.26, 120,984.33 and 49,938.78 is: 68,898.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691.26 : 120,984.33 = 49,938.78 : x
  2. Step 2: Convert to fraction form
    87,691.26/120,984.33 = 49,938.78/x
  3. Step 3: Cross multiply
    87,691.26x = 120,984.33 × 49,938.78
  4. Step 4: Simplify right side
    87,691.26x = 6,041,809,839.32
  5. Step 5: Solve for x
    x = 6,041,809,839.32/87,691.26
  6. Step 6: Final answer
    x = 68,898.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.