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Finding the Fourth Proportional to 167.06, 250.68 and 81.56

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Solution

The fourth proportional to 167.06, 250.68 and 81.56 is: 122.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.06 : 250.68 = 81.56 : x
  2. Step 2: Convert to fraction form
    167.06/250.68 = 81.56/x
  3. Step 3: Cross multiply
    167.06x = 250.68 × 81.56
  4. Step 4: Simplify right side
    167.06x = 20,446.39
  5. Step 5: Solve for x
    x = 20,446.39/167.06
  6. Step 6: Final answer
    x = 122.39

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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.