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Finding the Fourth Proportional to 425,321.52, 638,107 and 125,810

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Solution

The fourth proportional to 425,321.52, 638,107 and 125,810 is: 188,751.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,321.52 : 638,107 = 125,810 : x
  2. Step 2: Convert to fraction form
    425,321.52/638,107 = 125,810/x
  3. Step 3: Cross multiply
    425,321.52x = 638,107 × 125,810
  4. Step 4: Simplify right side
    425,321.52x = 80,280,241,670
  5. Step 5: Solve for x
    x = 80,280,241,670/425,321.52
  6. Step 6: Final answer
    x = 188,751.89

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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.