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Finding the Fourth Proportional to 140.20, 193.41 and 98.75

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Solution

The fourth proportional to 140.20, 193.41 and 98.75 is: 136.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.20 : 193.41 = 98.75 : x
  2. Step 2: Convert to fraction form
    140.20/193.41 = 98.75/x
  3. Step 3: Cross multiply
    140.20x = 193.41 × 98.75
  4. Step 4: Simplify right side
    140.20x = 19,099.72
  5. Step 5: Solve for x
    x = 19,099.72/140.20
  6. Step 6: Final answer
    x = 136.23

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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.