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Finding the Fourth Proportional to 136.89, 204.34 and 126.87

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Solution

The fourth proportional to 136.89, 204.34 and 126.87 is: 189.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.89 : 204.34 = 126.87 : x
  2. Step 2: Convert to fraction form
    136.89/204.34 = 126.87/x
  3. Step 3: Cross multiply
    136.89x = 204.34 × 126.87
  4. Step 4: Simplify right side
    136.89x = 25,924.62
  5. Step 5: Solve for x
    x = 25,924.62/136.89
  6. Step 6: Final answer
    x = 189.38

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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.