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Finding the Fourth Proportional to 149.18, 223.25 and 91.39

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Solution

The fourth proportional to 149.18, 223.25 and 91.39 is: 136.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.18 : 223.25 = 91.39 : x
  2. Step 2: Convert to fraction form
    149.18/223.25 = 91.39/x
  3. Step 3: Cross multiply
    149.18x = 223.25 × 91.39
  4. Step 4: Simplify right side
    149.18x = 20,401.24
  5. Step 5: Solve for x
    x = 20,401.24/149.18
  6. Step 6: Final answer
    x = 136.76

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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.