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Finding the Fourth Proportional to 96.98, 133.12 and 91.58

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Solution

The fourth proportional to 96.98, 133.12 and 91.58 is: 125.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.98 : 133.12 = 91.58 : x
  2. Step 2: Convert to fraction form
    96.98/133.12 = 91.58/x
  3. Step 3: Cross multiply
    96.98x = 133.12 × 91.58
  4. Step 4: Simplify right side
    96.98x = 12,191.13
  5. Step 5: Solve for x
    x = 12,191.13/96.98
  6. Step 6: Final answer
    x = 125.71

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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.