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Finding the Fourth Proportional to 139.62, 194.22 and 136.98

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Solution

The fourth proportional to 139.62, 194.22 and 136.98 is: 190.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.62 : 194.22 = 136.98 : x
  2. Step 2: Convert to fraction form
    139.62/194.22 = 136.98/x
  3. Step 3: Cross multiply
    139.62x = 194.22 × 136.98
  4. Step 4: Simplify right side
    139.62x = 26,603.57
  5. Step 5: Solve for x
    x = 26,603.57/139.62
  6. Step 6: Final answer
    x = 190.54

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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.