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Finding the Fourth Proportional to 80.41, 110.67 and 71.14

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Solution

The fourth proportional to 80.41, 110.67 and 71.14 is: 97.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.41 : 110.67 = 71.14 : x
  2. Step 2: Convert to fraction form
    80.41/110.67 = 71.14/x
  3. Step 3: Cross multiply
    80.41x = 110.67 × 71.14
  4. Step 4: Simplify right side
    80.41x = 7,873.06
  5. Step 5: Solve for x
    x = 7,873.06/80.41
  6. Step 6: Final answer
    x = 97.91

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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.