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Finding the Fourth Proportional to 226.03, 339.09 and 81.73

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Solution

The fourth proportional to 226.03, 339.09 and 81.73 is: 122.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.03 : 339.09 = 81.73 : x
  2. Step 2: Convert to fraction form
    226.03/339.09 = 81.73/x
  3. Step 3: Cross multiply
    226.03x = 339.09 × 81.73
  4. Step 4: Simplify right side
    226.03x = 27,713.83
  5. Step 5: Solve for x
    x = 27,713.83/226.03
  6. Step 6: Final answer
    x = 122.61

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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.