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Finding the Fourth Proportional to 167.92, 251.80 and 76.64

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Solution

The fourth proportional to 167.92, 251.80 and 76.64 is: 114.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.92 : 251.80 = 76.64 : x
  2. Step 2: Convert to fraction form
    167.92/251.80 = 76.64/x
  3. Step 3: Cross multiply
    167.92x = 251.80 × 76.64
  4. Step 4: Simplify right side
    167.92x = 19,297.95
  5. Step 5: Solve for x
    x = 19,297.95/167.92
  6. Step 6: Final answer
    x = 114.92

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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.