Home / 81,472.44-111,786.52-80,074.68

Finding the Fourth Proportional to 81,472.44, 111,786.52 and 80,074.68

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Solution

The fourth proportional to 81,472.44, 111,786.52 and 80,074.68 is: 109,868.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,472.44 : 111,786.52 = 80,074.68 : x
  2. Step 2: Convert to fraction form
    81,472.44/111,786.52 = 80,074.68/x
  3. Step 3: Cross multiply
    81,472.44x = 111,786.52 × 80,074.68
  4. Step 4: Simplify right side
    81,472.44x = 8,951,269,617.13
  5. Step 5: Solve for x
    x = 8,951,269,617.13/81,472.44
  6. Step 6: Final answer
    x = 109,868.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.