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Finding the Fourth Proportional to 96.80, 134.20 and 91.04

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Solution

The fourth proportional to 96.80, 134.20 and 91.04 is: 126.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.80 : 134.20 = 91.04 : x
  2. Step 2: Convert to fraction form
    96.80/134.20 = 91.04/x
  3. Step 3: Cross multiply
    96.80x = 134.20 × 91.04
  4. Step 4: Simplify right side
    96.80x = 12,217.57
  5. Step 5: Solve for x
    x = 12,217.57/96.80
  6. Step 6: Final answer
    x = 126.21

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These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.