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Finding the Fourth Proportional to 80.28, 110.01 and 76.92

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Solution

The fourth proportional to 80.28, 110.01 and 76.92 is: 105.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.28 : 110.01 = 76.92 : x
  2. Step 2: Convert to fraction form
    80.28/110.01 = 76.92/x
  3. Step 3: Cross multiply
    80.28x = 110.01 × 76.92
  4. Step 4: Simplify right side
    80.28x = 8,461.97
  5. Step 5: Solve for x
    x = 8,461.97/80.28
  6. Step 6: Final answer
    x = 105.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.