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Finding the Fourth Proportional to 96.13, 144.23 and 81.54

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Solution

The fourth proportional to 96.13, 144.23 and 81.54 is: 122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.13 : 144.23 = 81.54 : x
  2. Step 2: Convert to fraction form
    96.13/144.23 = 81.54/x
  3. Step 3: Cross multiply
    96.13x = 144.23 × 81.54
  4. Step 4: Simplify right side
    96.13x = 11,759.75
  5. Step 5: Solve for x
    x = 11,759.75/96.13
  6. Step 6: Final answer
    x = 122.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.