Home / 81,375.66-122,082.12-31,456.17

Finding the Fourth Proportional to 81,375.66, 122,082.12 and 31,456.17

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Solution

The fourth proportional to 81,375.66, 122,082.12 and 31,456.17 is: 47,191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,375.66 : 122,082.12 = 31,456.17 : x
  2. Step 2: Convert to fraction form
    81,375.66/122,082.12 = 31,456.17/x
  3. Step 3: Cross multiply
    81,375.66x = 122,082.12 × 31,456.17
  4. Step 4: Simplify right side
    81,375.66x = 3,840,235,920.68
  5. Step 5: Solve for x
    x = 3,840,235,920.68/81,375.66
  6. Step 6: Final answer
    x = 47,191.46

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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.