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Finding the Fourth Proportional to 381,391.70, 572,087.55 and 100,937.30

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Solution

The fourth proportional to 381,391.70, 572,087.55 and 100,937.30 is: 151,405.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,391.70 : 572,087.55 = 100,937.30 : x
  2. Step 2: Convert to fraction form
    381,391.70/572,087.55 = 100,937.30/x
  3. Step 3: Cross multiply
    381,391.70x = 572,087.55 × 100,937.30
  4. Step 4: Simplify right side
    381,391.70x = 57,744,972,660.62
  5. Step 5: Solve for x
    x = 57,744,972,660.62/381,391.70
  6. Step 6: Final answer
    x = 151,405.95

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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.