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Finding the Fourth Proportional to 79,826, 119,738.52 and 20,661.44

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Solution

The fourth proportional to 79,826, 119,738.52 and 20,661.44 is: 30,992.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,826 : 119,738.52 = 20,661.44 : x
  2. Step 2: Convert to fraction form
    79,826/119,738.52 = 20,661.44/x
  3. Step 3: Cross multiply
    79,826x = 119,738.52 × 20,661.44
  4. Step 4: Simplify right side
    79,826x = 2,473,970,246.67
  5. Step 5: Solve for x
    x = 2,473,970,246.67/79,826
  6. Step 6: Final answer
    x = 30,992.04

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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.