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Finding the Fourth Proportional to 140.28, 193.38 and 111.12

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Solution

The fourth proportional to 140.28, 193.38 and 111.12 is: 153.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.28 : 193.38 = 111.12 : x
  2. Step 2: Convert to fraction form
    140.28/193.38 = 111.12/x
  3. Step 3: Cross multiply
    140.28x = 193.38 × 111.12
  4. Step 4: Simplify right side
    140.28x = 21,488.39
  5. Step 5: Solve for x
    x = 21,488.39/140.28
  6. Step 6: Final answer
    x = 153.18

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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.