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Finding the Fourth Proportional to 136.75, 205.13 and 44.20

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Solution

The fourth proportional to 136.75, 205.13 and 44.20 is: 66.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.75 : 205.13 = 44.20 : x
  2. Step 2: Convert to fraction form
    136.75/205.13 = 44.20/x
  3. Step 3: Cross multiply
    136.75x = 205.13 × 44.20
  4. Step 4: Simplify right side
    136.75x = 9,067.50
  5. Step 5: Solve for x
    x = 9,067.50/136.75
  6. Step 6: Final answer
    x = 66.31

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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.