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Finding the Fourth Proportional to 80,378.44, 110,843.36 and 74,021.56

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Solution

The fourth proportional to 80,378.44, 110,843.36 and 74,021.56 is: 102,077.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,378.44 : 110,843.36 = 74,021.56 : x
  2. Step 2: Convert to fraction form
    80,378.44/110,843.36 = 74,021.56/x
  3. Step 3: Cross multiply
    80,378.44x = 110,843.36 × 74,021.56
  4. Step 4: Simplify right side
    80,378.44x = 8,204,797,498.52
  5. Step 5: Solve for x
    x = 8,204,797,498.52/80,378.44
  6. Step 6: Final answer
    x = 102,077.10

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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.