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Finding the Fourth Proportional to 149.46, 224.22 and 81.02

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Solution

The fourth proportional to 149.46, 224.22 and 81.02 is: 121.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.46 : 224.22 = 81.02 : x
  2. Step 2: Convert to fraction form
    149.46/224.22 = 81.02/x
  3. Step 3: Cross multiply
    149.46x = 224.22 × 81.02
  4. Step 4: Simplify right side
    149.46x = 18,166.30
  5. Step 5: Solve for x
    x = 18,166.30/149.46
  6. Step 6: Final answer
    x = 121.55

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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.