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Finding the Fourth Proportional to 167.98, 252.04 and 76.66

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Solution

The fourth proportional to 167.98, 252.04 and 76.66 is: 115.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.98 : 252.04 = 76.66 : x
  2. Step 2: Convert to fraction form
    167.98/252.04 = 76.66/x
  3. Step 3: Cross multiply
    167.98x = 252.04 × 76.66
  4. Step 4: Simplify right side
    167.98x = 19,321.39
  5. Step 5: Solve for x
    x = 19,321.39/167.98
  6. Step 6: Final answer
    x = 115.02

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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.