Home / 85,840,000.20-128,760,000.30-82,491,921.90

Finding the Fourth Proportional to 85,840,000.20, 128,760,000.30 and 82,491,921.90

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Solution

The fourth proportional to 85,840,000.20, 128,760,000.30 and 82,491,921.90 is: 123,737,882.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840,000.20 : 128,760,000.30 = 82,491,921.90 : x
  2. Step 2: Convert to fraction form
    85,840,000.20/128,760,000.30 = 82,491,921.90/x
  3. Step 3: Cross multiply
    85,840,000.20x = 128,760,000.30 × 82,491,921.90
  4. Step 4: Simplify right side
    85,840,000.20x = 10,621,659,888,591,578
  5. Step 5: Solve for x
    x = 10,621,659,888,591,578/85,840,000.20
  6. Step 6: Final answer
    x = 123,737,882.85

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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.