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Finding the Fourth Proportional to 171.71, 236.93 and 101.78

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Solution

The fourth proportional to 171.71, 236.93 and 101.78 is: 140.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.71 : 236.93 = 101.78 : x
  2. Step 2: Convert to fraction form
    171.71/236.93 = 101.78/x
  3. Step 3: Cross multiply
    171.71x = 236.93 × 101.78
  4. Step 4: Simplify right side
    171.71x = 24,113.04
  5. Step 5: Solve for x
    x = 24,113.04/171.71
  6. Step 6: Final answer
    x = 140.43

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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.