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Finding the Fourth Proportional to 149.20, 223.52 and 115.04

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Solution

The fourth proportional to 149.20, 223.52 and 115.04 is: 172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.20 : 223.52 = 115.04 : x
  2. Step 2: Convert to fraction form
    149.20/223.52 = 115.04/x
  3. Step 3: Cross multiply
    149.20x = 223.52 × 115.04
  4. Step 4: Simplify right side
    149.20x = 25,713.74
  5. Step 5: Solve for x
    x = 25,713.74/149.20
  6. Step 6: Final answer
    x = 172.34

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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.