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Finding the Fourth Proportional to 171.91, 257.31 and 93.71

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Solution

The fourth proportional to 171.91, 257.31 and 93.71 is: 140.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.91 : 257.31 = 93.71 : x
  2. Step 2: Convert to fraction form
    171.91/257.31 = 93.71/x
  3. Step 3: Cross multiply
    171.91x = 257.31 × 93.71
  4. Step 4: Simplify right side
    171.91x = 24,112.52
  5. Step 5: Solve for x
    x = 24,112.52/171.91
  6. Step 6: Final answer
    x = 140.26

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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.