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Finding the Fourth Proportional to 381,391.93, 572,121.24 and 141,508.54

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Solution

The fourth proportional to 381,391.93, 572,121.24 and 141,508.54 is: 212,275.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,391.93 : 572,121.24 = 141,508.54 : x
  2. Step 2: Convert to fraction form
    381,391.93/572,121.24 = 141,508.54/x
  3. Step 3: Cross multiply
    381,391.93x = 572,121.24 × 141,508.54
  4. Step 4: Simplify right side
    381,391.93x = 80,960,041,375.39
  5. Step 5: Solve for x
    x = 80,960,041,375.39/381,391.93
  6. Step 6: Final answer
    x = 212,275.18

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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.