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Finding the Fourth Proportional to 102.32, 140.92 and 80.44

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Solution

The fourth proportional to 102.32, 140.92 and 80.44 is: 110.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.32 : 140.92 = 80.44 : x
  2. Step 2: Convert to fraction form
    102.32/140.92 = 80.44/x
  3. Step 3: Cross multiply
    102.32x = 140.92 × 80.44
  4. Step 4: Simplify right side
    102.32x = 11,335.60
  5. Step 5: Solve for x
    x = 11,335.60/102.32
  6. Step 6: Final answer
    x = 110.79

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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.