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Finding the Fourth Proportional to 425,572.38, 638,451.92 and 126,076.37

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Solution

The fourth proportional to 425,572.38, 638,451.92 and 126,076.37 is: 189,142.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,572.38 : 638,451.92 = 126,076.37 : x
  2. Step 2: Convert to fraction form
    425,572.38/638,451.92 = 126,076.37/x
  3. Step 3: Cross multiply
    425,572.38x = 638,451.92 × 126,076.37
  4. Step 4: Simplify right side
    425,572.38x = 80,493,697,616.06
  5. Step 5: Solve for x
    x = 80,493,697,616.06/425,572.38
  6. Step 6: Final answer
    x = 189,142.20

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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.