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Finding the Fourth Proportional to 171.79, 236.92 and 145.54

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Solution

The fourth proportional to 171.79, 236.92 and 145.54 is: 200.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.79 : 236.92 = 145.54 : x
  2. Step 2: Convert to fraction form
    171.79/236.92 = 145.54/x
  3. Step 3: Cross multiply
    171.79x = 236.92 × 145.54
  4. Step 4: Simplify right side
    171.79x = 34,480.21
  5. Step 5: Solve for x
    x = 34,480.21/171.79
  6. Step 6: Final answer
    x = 200.71

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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.