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Finding the Fourth Proportional to 67,338.87, 100,998.58 and 20,579.19

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Solution

The fourth proportional to 67,338.87, 100,998.58 and 20,579.19 is: 30,865.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,338.87 : 100,998.58 = 20,579.19 : x
  2. Step 2: Convert to fraction form
    67,338.87/100,998.58 = 20,579.19/x
  3. Step 3: Cross multiply
    67,338.87x = 100,998.58 × 20,579.19
  4. Step 4: Simplify right side
    67,338.87x = 2,078,468,967.55
  5. Step 5: Solve for x
    x = 2,078,468,967.55/67,338.87
  6. Step 6: Final answer
    x = 30,865.81

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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.