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Finding the Fourth Proportional to 96.28, 144.55 and 74.62

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Solution

The fourth proportional to 96.28, 144.55 and 74.62 is: 112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.28 : 144.55 = 74.62 : x
  2. Step 2: Convert to fraction form
    96.28/144.55 = 74.62/x
  3. Step 3: Cross multiply
    96.28x = 144.55 × 74.62
  4. Step 4: Simplify right side
    96.28x = 10,786.59
  5. Step 5: Solve for x
    x = 10,786.59/96.28
  6. Step 6: Final answer
    x = 112.04

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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.