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Finding the Fourth Proportional to 136.71, 204.93 and 82.49

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Solution

The fourth proportional to 136.71, 204.93 and 82.49 is: 123.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.71 : 204.93 = 82.49 : x
  2. Step 2: Convert to fraction form
    136.71/204.93 = 82.49/x
  3. Step 3: Cross multiply
    136.71x = 204.93 × 82.49
  4. Step 4: Simplify right side
    136.71x = 16,903.65
  5. Step 5: Solve for x
    x = 16,903.65/136.71
  6. Step 6: Final answer
    x = 123.65

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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.