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Finding the Fourth Proportional to 149.40, 223.25 and 108.90

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Solution

The fourth proportional to 149.40, 223.25 and 108.90 is: 162.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.40 : 223.25 = 108.90 : x
  2. Step 2: Convert to fraction form
    149.40/223.25 = 108.90/x
  3. Step 3: Cross multiply
    149.40x = 223.25 × 108.90
  4. Step 4: Simplify right side
    149.40x = 24,311.38
  5. Step 5: Solve for x
    x = 24,311.38/149.40
  6. Step 6: Final answer
    x = 162.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.