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Finding the Fourth Proportional to 111.14, 166.79 and 104.42

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Solution

The fourth proportional to 111.14, 166.79 and 104.42 is: 156.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.14 : 166.79 = 104.42 : x
  2. Step 2: Convert to fraction form
    111.14/166.79 = 104.42/x
  3. Step 3: Cross multiply
    111.14x = 166.79 × 104.42
  4. Step 4: Simplify right side
    111.14x = 17,416.21
  5. Step 5: Solve for x
    x = 17,416.21/111.14
  6. Step 6: Final answer
    x = 156.71

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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.