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Finding the Fourth Proportional to 171.39, 236.79 and 136.47

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Solution

The fourth proportional to 171.39, 236.79 and 136.47 is: 188.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.39 : 236.79 = 136.47 : x
  2. Step 2: Convert to fraction form
    171.39/236.79 = 136.47/x
  3. Step 3: Cross multiply
    171.39x = 236.79 × 136.47
  4. Step 4: Simplify right side
    171.39x = 32,314.73
  5. Step 5: Solve for x
    x = 32,314.73/171.39
  6. Step 6: Final answer
    x = 188.55

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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.