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Finding the Fourth Proportional to 68,793.75, 103,183.72 and 18,878.87

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Solution

The fourth proportional to 68,793.75, 103,183.72 and 18,878.87 is: 28,316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,793.75 : 103,183.72 = 18,878.87 : x
  2. Step 2: Convert to fraction form
    68,793.75/103,183.72 = 18,878.87/x
  3. Step 3: Cross multiply
    68,793.75x = 103,183.72 × 18,878.87
  4. Step 4: Simplify right side
    68,793.75x = 1,947,991,425.68
  5. Step 5: Solve for x
    x = 1,947,991,425.68/68,793.75
  6. Step 6: Final answer
    x = 28,316.40

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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.