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Finding the Fourth Proportional to 140.90, 194.62 and 108.55

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Solution

The fourth proportional to 140.90, 194.62 and 108.55 is: 149.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.90 : 194.62 = 108.55 : x
  2. Step 2: Convert to fraction form
    140.90/194.62 = 108.55/x
  3. Step 3: Cross multiply
    140.90x = 194.62 × 108.55
  4. Step 4: Simplify right side
    140.90x = 21,125.03
  5. Step 5: Solve for x
    x = 21,125.03/140.90
  6. Step 6: Final answer
    x = 149.93

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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.