Home / 81,475.44-111,790.62-80,077.68

Finding the Fourth Proportional to 81,475.44, 111,790.62 and 80,077.68

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Solution

The fourth proportional to 81,475.44, 111,790.62 and 80,077.68 is: 109,872.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,475.44 : 111,790.62 = 80,077.68 : x
  2. Step 2: Convert to fraction form
    81,475.44/111,790.62 = 80,077.68/x
  3. Step 3: Cross multiply
    81,475.44x = 111,790.62 × 80,077.68
  4. Step 4: Simplify right side
    81,475.44x = 8,951,933,495.36
  5. Step 5: Solve for x
    x = 8,951,933,495.36/81,475.44
  6. Step 6: Final answer
    x = 109,872.78

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1.5x scale

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.