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Finding the Fourth Proportional to 79,578.61, 119,367.37 and 20,414.32

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Solution

The fourth proportional to 79,578.61, 119,367.37 and 20,414.32 is: 30,621.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,578.61 : 119,367.37 = 20,414.32 : x
  2. Step 2: Convert to fraction form
    79,578.61/119,367.37 = 20,414.32/x
  3. Step 3: Cross multiply
    79,578.61x = 119,367.37 × 20,414.32
  4. Step 4: Simplify right side
    79,578.61x = 2,436,802,989.83
  5. Step 5: Solve for x
    x = 2,436,802,989.83/79,578.61
  6. Step 6: Final answer
    x = 30,621.33

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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.