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Finding the Fourth Proportional to 425,572.15, 638,451.67 and 126,076.18

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Solution

The fourth proportional to 425,572.15, 638,451.67 and 126,076.18 is: 189,141.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,572.15 : 638,451.67 = 126,076.18 : x
  2. Step 2: Convert to fraction form
    425,572.15/638,451.67 = 126,076.18/x
  3. Step 3: Cross multiply
    425,572.15x = 638,451.67 × 126,076.18
  4. Step 4: Simplify right side
    425,572.15x = 80,493,545,756.90
  5. Step 5: Solve for x
    x = 80,493,545,756.90/425,572.15
  6. Step 6: Final answer
    x = 189,141.95

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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.