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Finding the Fourth Proportional to 53,879.46, 80,819.19 and 18,819.42

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Solution

The fourth proportional to 53,879.46, 80,819.19 and 18,819.42 is: 28,229.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,879.46 : 80,819.19 = 18,819.42 : x
  2. Step 2: Convert to fraction form
    53,879.46/80,819.19 = 18,819.42/x
  3. Step 3: Cross multiply
    53,879.46x = 80,819.19 × 18,819.42
  4. Step 4: Simplify right side
    53,879.46x = 1,520,970,280.67
  5. Step 5: Solve for x
    x = 1,520,970,280.67/53,879.46
  6. Step 6: Final answer
    x = 28,229.13

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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.