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Finding the Fourth Proportional to 178,870.20, 267,721.14 and 131,472.78

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Solution

The fourth proportional to 178,870.20, 267,721.14 and 131,472.78 is: 196,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,870.20 : 267,721.14 = 131,472.78 : x
  2. Step 2: Convert to fraction form
    178,870.20/267,721.14 = 131,472.78/x
  3. Step 3: Cross multiply
    178,870.20x = 267,721.14 × 131,472.78
  4. Step 4: Simplify right side
    178,870.20x = 35,198,042,540.57
  5. Step 5: Solve for x
    x = 35,198,042,540.57/178,870.20
  6. Step 6: Final answer
    x = 196,779.80

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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.