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Finding the Fourth Proportional to 425,635.08, 638,546.01 and 126,139.11

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Solution

The fourth proportional to 425,635.08, 638,546.01 and 126,139.11 is: 189,236.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,635.08 : 638,546.01 = 126,139.11 : x
  2. Step 2: Convert to fraction form
    425,635.08/638,546.01 = 126,139.11/x
  3. Step 3: Cross multiply
    425,635.08x = 638,546.01 × 126,139.11
  4. Step 4: Simplify right side
    425,635.08x = 80,545,625,395.45
  5. Step 5: Solve for x
    x = 80,545,625,395.45/425,635.08
  6. Step 6: Final answer
    x = 189,236.34

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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.