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Finding the Fourth Proportional to 381,759.70, 572,544.91 and 129,034.57

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Solution

The fourth proportional to 381,759.70, 572,544.91 and 129,034.57 is: 193,519.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,759.70 : 572,544.91 = 129,034.57 : x
  2. Step 2: Convert to fraction form
    381,759.70/572,544.91 = 129,034.57/x
  3. Step 3: Cross multiply
    381,759.70x = 572,544.91 × 129,034.57
  4. Step 4: Simplify right side
    381,759.70x = 73,878,086,267.54
  5. Step 5: Solve for x
    x = 73,878,086,267.54/381,759.70
  6. Step 6: Final answer
    x = 193,519.87

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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.