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Finding the Fourth Proportional to 81,450.80, 122,176.20 and 75,545.90

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Solution

The fourth proportional to 81,450.80, 122,176.20 and 75,545.90 is: 113,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.80 : 122,176.20 = 75,545.90 : x
  2. Step 2: Convert to fraction form
    81,450.80/122,176.20 = 75,545.90/x
  3. Step 3: Cross multiply
    81,450.80x = 122,176.20 × 75,545.90
  4. Step 4: Simplify right side
    81,450.80x = 9,229,910,987.58
  5. Step 5: Solve for x
    x = 9,229,910,987.58/81,450.80
  6. Step 6: Final answer
    x = 113,318.85

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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.