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Finding the Fourth Proportional to 147.44, 221.28 and 119.12

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Solution

The fourth proportional to 147.44, 221.28 and 119.12 is: 178.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.44 : 221.28 = 119.12 : x
  2. Step 2: Convert to fraction form
    147.44/221.28 = 119.12/x
  3. Step 3: Cross multiply
    147.44x = 221.28 × 119.12
  4. Step 4: Simplify right side
    147.44x = 26,358.87
  5. Step 5: Solve for x
    x = 26,358.87/147.44
  6. Step 6: Final answer
    x = 178.78

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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.