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Finding the Fourth Proportional to 167.20, 230.36 and 122.85

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Solution

The fourth proportional to 167.20, 230.36 and 122.85 is: 169.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.20 : 230.36 = 122.85 : x
  2. Step 2: Convert to fraction form
    167.20/230.36 = 122.85/x
  3. Step 3: Cross multiply
    167.20x = 230.36 × 122.85
  4. Step 4: Simplify right side
    167.20x = 28,299.73
  5. Step 5: Solve for x
    x = 28,299.73/167.20
  6. Step 6: Final answer
    x = 169.26

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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.