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Finding the Fourth Proportional to 66.82, 100.20 and 41.14

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Solution

The fourth proportional to 66.82, 100.20 and 41.14 is: 61.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.82 : 100.20 = 41.14 : x
  2. Step 2: Convert to fraction form
    66.82/100.20 = 41.14/x
  3. Step 3: Cross multiply
    66.82x = 100.20 × 41.14
  4. Step 4: Simplify right side
    66.82x = 4,121.73
  5. Step 5: Solve for x
    x = 4,121.73/66.82
  6. Step 6: Final answer
    x = 61.69

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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.