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Finding the Fourth Proportional to 167.54, 231.11 and 108.55

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Solution

The fourth proportional to 167.54, 231.11 and 108.55 is: 149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.54 : 231.11 = 108.55 : x
  2. Step 2: Convert to fraction form
    167.54/231.11 = 108.55/x
  3. Step 3: Cross multiply
    167.54x = 231.11 × 108.55
  4. Step 4: Simplify right side
    167.54x = 25,085.87
  5. Step 5: Solve for x
    x = 25,085.87/167.54
  6. Step 6: Final answer
    x = 149.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.