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Finding the Fourth Proportional to 136.74, 204.15 and 125.22

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Solution

The fourth proportional to 136.74, 204.15 and 125.22 is: 186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.74 : 204.15 = 125.22 : x
  2. Step 2: Convert to fraction form
    136.74/204.15 = 125.22/x
  3. Step 3: Cross multiply
    136.74x = 204.15 × 125.22
  4. Step 4: Simplify right side
    136.74x = 25,563.66
  5. Step 5: Solve for x
    x = 25,563.66/136.74
  6. Step 6: Final answer
    x = 186.95

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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.