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Finding the Fourth Proportional to 226.16, 339.18 and 81.80

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Solution

The fourth proportional to 226.16, 339.18 and 81.80 is: 122.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.16 : 339.18 = 81.80 : x
  2. Step 2: Convert to fraction form
    226.16/339.18 = 81.80/x
  3. Step 3: Cross multiply
    226.16x = 339.18 × 81.80
  4. Step 4: Simplify right side
    226.16x = 27,744.92
  5. Step 5: Solve for x
    x = 27,744.92/226.16
  6. Step 6: Final answer
    x = 122.68

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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.