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Finding the Fourth Proportional to 169.27, 253.82 and 77.89

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Solution

The fourth proportional to 169.27, 253.82 and 77.89 is: 116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.27 : 253.82 = 77.89 : x
  2. Step 2: Convert to fraction form
    169.27/253.82 = 77.89/x
  3. Step 3: Cross multiply
    169.27x = 253.82 × 77.89
  4. Step 4: Simplify right side
    169.27x = 19,770.04
  5. Step 5: Solve for x
    x = 19,770.04/169.27
  6. Step 6: Final answer
    x = 116.80

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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.