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Finding the Fourth Proportional to 81,680.90, 122,456.55 and 44,744.90

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Solution

The fourth proportional to 81,680.90, 122,456.55 and 44,744.90 is: 67,081.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,680.90 : 122,456.55 = 44,744.90 : x
  2. Step 2: Convert to fraction form
    81,680.90/122,456.55 = 44,744.90/x
  3. Step 3: Cross multiply
    81,680.90x = 122,456.55 × 44,744.90
  4. Step 4: Simplify right side
    81,680.90x = 5,479,306,084.10
  5. Step 5: Solve for x
    x = 5,479,306,084.10/81,680.90
  6. Step 6: Final answer
    x = 67,081.85

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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.