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Finding the Fourth Proportional to 66.25, 99.42 and 27.73

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Solution

The fourth proportional to 66.25, 99.42 and 27.73 is: 41.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.25 : 99.42 = 27.73 : x
  2. Step 2: Convert to fraction form
    66.25/99.42 = 27.73/x
  3. Step 3: Cross multiply
    66.25x = 99.42 × 27.73
  4. Step 4: Simplify right side
    66.25x = 2,756.78
  5. Step 5: Solve for x
    x = 2,756.78/66.25
  6. Step 6: Final answer
    x = 41.61

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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.