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Finding the Fourth Proportional to 41,979.87, 62,994.42 and 30,120.87

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Solution

The fourth proportional to 41,979.87, 62,994.42 and 30,120.87 is: 45,198.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,979.87 : 62,994.42 = 30,120.87 : x
  2. Step 2: Convert to fraction form
    41,979.87/62,994.42 = 30,120.87/x
  3. Step 3: Cross multiply
    41,979.87x = 62,994.42 × 30,120.87
  4. Step 4: Simplify right side
    41,979.87x = 1,897,446,388.08
  5. Step 5: Solve for x
    x = 1,897,446,388.08/41,979.87
  6. Step 6: Final answer
    x = 45,198.95

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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.