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Finding the Fourth Proportional to 171.59, 236.43 and 140.40

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Solution

The fourth proportional to 171.59, 236.43 and 140.40 is: 193.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.59 : 236.43 = 140.40 : x
  2. Step 2: Convert to fraction form
    171.59/236.43 = 140.40/x
  3. Step 3: Cross multiply
    171.59x = 236.43 × 140.40
  4. Step 4: Simplify right side
    171.59x = 33,194.77
  5. Step 5: Solve for x
    x = 33,194.77/171.59
  6. Step 6: Final answer
    x = 193.46

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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.