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Finding the Fourth Proportional to 136.71, 203.95 and 126.89

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Solution

The fourth proportional to 136.71, 203.95 and 126.89 is: 189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.71 : 203.95 = 126.89 : x
  2. Step 2: Convert to fraction form
    136.71/203.95 = 126.89/x
  3. Step 3: Cross multiply
    136.71x = 203.95 × 126.89
  4. Step 4: Simplify right side
    136.71x = 25,879.41
  5. Step 5: Solve for x
    x = 25,879.41/136.71
  6. Step 6: Final answer
    x = 189.30

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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.