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Finding the Fourth Proportional to 140.56, 193.38 and 123.88

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Solution

The fourth proportional to 140.56, 193.38 and 123.88 is: 170.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.56 : 193.38 = 123.88 : x
  2. Step 2: Convert to fraction form
    140.56/193.38 = 123.88/x
  3. Step 3: Cross multiply
    140.56x = 193.38 × 123.88
  4. Step 4: Simplify right side
    140.56x = 23,955.91
  5. Step 5: Solve for x
    x = 23,955.91/140.56
  6. Step 6: Final answer
    x = 170.43

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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.