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Finding the Fourth Proportional to 171.72, 257.33 and 116.74

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Solution

The fourth proportional to 171.72, 257.33 and 116.74 is: 174.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.72 : 257.33 = 116.74 : x
  2. Step 2: Convert to fraction form
    171.72/257.33 = 116.74/x
  3. Step 3: Cross multiply
    171.72x = 257.33 × 116.74
  4. Step 4: Simplify right side
    171.72x = 30,040.66
  5. Step 5: Solve for x
    x = 30,040.66/171.72
  6. Step 6: Final answer
    x = 174.94

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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.