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Finding the Fourth Proportional to 445,174.78, 667,763.25 and 129,639.34

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Solution

The fourth proportional to 445,174.78, 667,763.25 and 129,639.34 is: 194,459.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,174.78 : 667,763.25 = 129,639.34 : x
  2. Step 2: Convert to fraction form
    445,174.78/667,763.25 = 129,639.34/x
  3. Step 3: Cross multiply
    445,174.78x = 667,763.25 × 129,639.34
  4. Step 4: Simplify right side
    445,174.78x = 86,568,387,006.26
  5. Step 5: Solve for x
    x = 86,568,387,006.26/445,174.78
  6. Step 6: Final answer
    x = 194,459.32

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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.