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Finding the Fourth Proportional to 136.96, 188.99 and 92.61

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Solution

The fourth proportional to 136.96, 188.99 and 92.61 is: 127.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.96 : 188.99 = 92.61 : x
  2. Step 2: Convert to fraction form
    136.96/188.99 = 92.61/x
  3. Step 3: Cross multiply
    136.96x = 188.99 × 92.61
  4. Step 4: Simplify right side
    136.96x = 17,500.96
  5. Step 5: Solve for x
    x = 17,500.96/136.96
  6. Step 6: Final answer
    x = 127.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.