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Finding the Fourth Proportional to 171.75, 235.98 and 140.58

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Solution

The fourth proportional to 171.75, 235.98 and 140.58 is: 193.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.75 : 235.98 = 140.58 : x
  2. Step 2: Convert to fraction form
    171.75/235.98 = 140.58/x
  3. Step 3: Cross multiply
    171.75x = 235.98 × 140.58
  4. Step 4: Simplify right side
    171.75x = 33,174.07
  5. Step 5: Solve for x
    x = 33,174.07/171.75
  6. Step 6: Final answer
    x = 193.15

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.