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Finding the Fourth Proportional to 139.27, 193.55 and 137.55

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Solution

The fourth proportional to 139.27, 193.55 and 137.55 is: 191.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.27 : 193.55 = 137.55 : x
  2. Step 2: Convert to fraction form
    139.27/193.55 = 137.55/x
  3. Step 3: Cross multiply
    139.27x = 193.55 × 137.55
  4. Step 4: Simplify right side
    139.27x = 26,622.80
  5. Step 5: Solve for x
    x = 26,622.80/139.27
  6. Step 6: Final answer
    x = 191.16

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.