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Finding the Fourth Proportional to 139.54, 193.38 and 137.58

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Solution

The fourth proportional to 139.54, 193.38 and 137.58 is: 190.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.54 : 193.38 = 137.58 : x
  2. Step 2: Convert to fraction form
    139.54/193.38 = 137.58/x
  3. Step 3: Cross multiply
    139.54x = 193.38 × 137.58
  4. Step 4: Simplify right side
    139.54x = 26,604.70
  5. Step 5: Solve for x
    x = 26,604.70/139.54
  6. Step 6: Final answer
    x = 190.66

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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.