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Finding the Fourth Proportional to 136.34, 204.25 and 90.55

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Solution

The fourth proportional to 136.34, 204.25 and 90.55 is: 135.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.34 : 204.25 = 90.55 : x
  2. Step 2: Convert to fraction form
    136.34/204.25 = 90.55/x
  3. Step 3: Cross multiply
    136.34x = 204.25 × 90.55
  4. Step 4: Simplify right side
    136.34x = 18,494.84
  5. Step 5: Solve for x
    x = 18,494.84/136.34
  6. Step 6: Final answer
    x = 135.65

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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.