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Finding the Fourth Proportional to 80,578.86, 111,201.99 and 55,138.59

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Solution

The fourth proportional to 80,578.86, 111,201.99 and 55,138.59 is: 76,093.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,578.86 : 111,201.99 = 55,138.59 : x
  2. Step 2: Convert to fraction form
    80,578.86/111,201.99 = 55,138.59/x
  3. Step 3: Cross multiply
    80,578.86x = 111,201.99 × 55,138.59
  4. Step 4: Simplify right side
    80,578.86x = 6,131,520,933.79
  5. Step 5: Solve for x
    x = 6,131,520,933.79/80,578.86
  6. Step 6: Final answer
    x = 76,093.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.