Home / 85,839,998.20-128,759,997.30-82,491,919.90

Finding the Fourth Proportional to 85,839,998.20, 128,759,997.30 and 82,491,919.90

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Solution

The fourth proportional to 85,839,998.20, 128,759,997.30 and 82,491,919.90 is: 123,737,879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,998.20 : 128,759,997.30 = 82,491,919.90 : x
  2. Step 2: Convert to fraction form
    85,839,998.20/128,759,997.30 = 82,491,919.90/x
  3. Step 3: Cross multiply
    85,839,998.20x = 128,759,997.30 × 82,491,919.90
  4. Step 4: Simplify right side
    85,839,998.20x = 10,621,659,383,595,816
  5. Step 5: Solve for x
    x = 10,621,659,383,595,816/85,839,998.20
  6. Step 6: Final answer
    x = 123,737,879.85

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1.5x scale

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.