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Finding the Fourth Proportional to 167.82, 251.97 and 91.05

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Solution

The fourth proportional to 167.82, 251.97 and 91.05 is: 136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.82 : 251.97 = 91.05 : x
  2. Step 2: Convert to fraction form
    167.82/251.97 = 91.05/x
  3. Step 3: Cross multiply
    167.82x = 251.97 × 91.05
  4. Step 4: Simplify right side
    167.82x = 22,941.87
  5. Step 5: Solve for x
    x = 22,941.87/167.82
  6. Step 6: Final answer
    x = 136.71

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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.