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Finding the Fourth Proportional to 136.55, 204.71 and 82.43

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Solution

The fourth proportional to 136.55, 204.71 and 82.43 is: 123.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.55 : 204.71 = 82.43 : x
  2. Step 2: Convert to fraction form
    136.55/204.71 = 82.43/x
  3. Step 3: Cross multiply
    136.55x = 204.71 × 82.43
  4. Step 4: Simplify right side
    136.55x = 16,873.22
  5. Step 5: Solve for x
    x = 16,873.22/136.55
  6. Step 6: Final answer
    x = 123.57

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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.