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Finding the Fourth Proportional to 149.21, 224.12 and 114.85

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Solution

The fourth proportional to 149.21, 224.12 and 114.85 is: 172.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.21 : 224.12 = 114.85 : x
  2. Step 2: Convert to fraction form
    149.21/224.12 = 114.85/x
  3. Step 3: Cross multiply
    149.21x = 224.12 × 114.85
  4. Step 4: Simplify right side
    149.21x = 25,739.61
  5. Step 5: Solve for x
    x = 25,739.61/149.21
  6. Step 6: Final answer
    x = 172.51

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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.