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Finding the Fourth Proportional to 136.80, 205.56 and 119.82

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Solution

The fourth proportional to 136.80, 205.56 and 119.82 is: 180.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.80 : 205.56 = 119.82 : x
  2. Step 2: Convert to fraction form
    136.80/205.56 = 119.82/x
  3. Step 3: Cross multiply
    136.80x = 205.56 × 119.82
  4. Step 4: Simplify right side
    136.80x = 24,630.20
  5. Step 5: Solve for x
    x = 24,630.20/136.80
  6. Step 6: Final answer
    x = 180.05

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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.