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Finding the Fourth Proportional to 140.74, 194.28 and 108.07

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Solution

The fourth proportional to 140.74, 194.28 and 108.07 is: 149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.74 : 194.28 = 108.07 : x
  2. Step 2: Convert to fraction form
    140.74/194.28 = 108.07/x
  3. Step 3: Cross multiply
    140.74x = 194.28 × 108.07
  4. Step 4: Simplify right side
    140.74x = 20,995.84
  5. Step 5: Solve for x
    x = 20,995.84/140.74
  6. Step 6: Final answer
    x = 149.18

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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.