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Finding the Fourth Proportional to 226,129.64, 339,229.08 and 74,279

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Solution

The fourth proportional to 226,129.64, 339,229.08 and 74,279 is: 111,429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,129.64 : 339,229.08 = 74,279 : x
  2. Step 2: Convert to fraction form
    226,129.64/339,229.08 = 74,279/x
  3. Step 3: Cross multiply
    226,129.64x = 339,229.08 × 74,279
  4. Step 4: Simplify right side
    226,129.64x = 25,197,596,833.32
  5. Step 5: Solve for x
    x = 25,197,596,833.32/226,129.64
  6. Step 6: Final answer
    x = 111,429.87

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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.