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Finding the Fourth Proportional to 171.27, 257.42 and 113.69

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Solution

The fourth proportional to 171.27, 257.42 and 113.69 is: 170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.27 : 257.42 = 113.69 : x
  2. Step 2: Convert to fraction form
    171.27/257.42 = 113.69/x
  3. Step 3: Cross multiply
    171.27x = 257.42 × 113.69
  4. Step 4: Simplify right side
    171.27x = 29,264.22
  5. Step 5: Solve for x
    x = 29,264.22/171.27
  6. Step 6: Final answer
    x = 170.87

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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.