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Finding the Fourth Proportional to 136.20, 203.25 and 112.20

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Solution

The fourth proportional to 136.20, 203.25 and 112.20 is: 167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.20 : 203.25 = 112.20 : x
  2. Step 2: Convert to fraction form
    136.20/203.25 = 112.20/x
  3. Step 3: Cross multiply
    136.20x = 203.25 × 112.20
  4. Step 4: Simplify right side
    136.20x = 22,804.65
  5. Step 5: Solve for x
    x = 22,804.65/136.20
  6. Step 6: Final answer
    x = 167.44

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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.