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Finding the Fourth Proportional to 136.44, 205.38 and 122.09

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Solution

The fourth proportional to 136.44, 205.38 and 122.09 is: 183.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.44 : 205.38 = 122.09 : x
  2. Step 2: Convert to fraction form
    136.44/205.38 = 122.09/x
  3. Step 3: Cross multiply
    136.44x = 205.38 × 122.09
  4. Step 4: Simplify right side
    136.44x = 25,073.82
  5. Step 5: Solve for x
    x = 25,073.82/136.44
  6. Step 6: Final answer
    x = 183.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.