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Finding the Fourth Proportional to 68,794.75, 103,185.21 and 18,879.87

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Solution

The fourth proportional to 68,794.75, 103,185.21 and 18,879.87 is: 28,317.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,794.75 : 103,185.21 = 18,879.87 : x
  2. Step 2: Convert to fraction form
    68,794.75/103,185.21 = 18,879.87/x
  3. Step 3: Cross multiply
    68,794.75x = 103,185.21 × 18,879.87
  4. Step 4: Simplify right side
    68,794.75x = 1,948,123,350.72
  5. Step 5: Solve for x
    x = 1,948,123,350.72/68,794.75
  6. Step 6: Final answer
    x = 28,317.91

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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.