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Finding the Fourth Proportional to 169.67, 255.43 and 115.91

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Solution

The fourth proportional to 169.67, 255.43 and 115.91 is: 174.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.67 : 255.43 = 115.91 : x
  2. Step 2: Convert to fraction form
    169.67/255.43 = 115.91/x
  3. Step 3: Cross multiply
    169.67x = 255.43 × 115.91
  4. Step 4: Simplify right side
    169.67x = 29,606.89
  5. Step 5: Solve for x
    x = 29,606.89/169.67
  6. Step 6: Final answer
    x = 174.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.