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Finding the Fourth Proportional to 169.76, 234.20 and 104.28

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Solution

The fourth proportional to 169.76, 234.20 and 104.28 is: 143.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.76 : 234.20 = 104.28 : x
  2. Step 2: Convert to fraction form
    169.76/234.20 = 104.28/x
  3. Step 3: Cross multiply
    169.76x = 234.20 × 104.28
  4. Step 4: Simplify right side
    169.76x = 24,422.38
  5. Step 5: Solve for x
    x = 24,422.38/169.76
  6. Step 6: Final answer
    x = 143.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.