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Finding the Fourth Proportional to 139,255.92, 209,269.44 and 135,879.84

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Solution

The fourth proportional to 139,255.92, 209,269.44 and 135,879.84 is: 204,195.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,255.92 : 209,269.44 = 135,879.84 : x
  2. Step 2: Convert to fraction form
    139,255.92/209,269.44 = 135,879.84/x
  3. Step 3: Cross multiply
    139,255.92x = 209,269.44 × 135,879.84
  4. Step 4: Simplify right side
    139,255.92x = 28,435,498,024.09
  5. Step 5: Solve for x
    x = 28,435,498,024.09/139,255.92
  6. Step 6: Final answer
    x = 204,195.97

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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.