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Finding the Fourth Proportional to 111.62, 166.61 and 95.42

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Solution

The fourth proportional to 111.62, 166.61 and 95.42 is: 142.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.62 : 166.61 = 95.42 : x
  2. Step 2: Convert to fraction form
    111.62/166.61 = 95.42/x
  3. Step 3: Cross multiply
    111.62x = 166.61 × 95.42
  4. Step 4: Simplify right side
    111.62x = 15,896.97
  5. Step 5: Solve for x
    x = 15,896.97/111.62
  6. Step 6: Final answer
    x = 142.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.