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Finding the Fourth Proportional to 139.44, 209.07 and 62.39

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Solution

The fourth proportional to 139.44, 209.07 and 62.39 is: 93.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.44 : 209.07 = 62.39 : x
  2. Step 2: Convert to fraction form
    139.44/209.07 = 62.39/x
  3. Step 3: Cross multiply
    139.44x = 209.07 × 62.39
  4. Step 4: Simplify right side
    139.44x = 13,042.83
  5. Step 5: Solve for x
    x = 13,042.83/139.44
  6. Step 6: Final answer
    x = 93.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.