Home / 82,360.20-123,540.30-72,190.65

Finding the Fourth Proportional to 82,360.20, 123,540.30 and 72,190.65

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Solution

The fourth proportional to 82,360.20, 123,540.30 and 72,190.65 is: 108,285.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,360.20 : 123,540.30 = 72,190.65 : x
  2. Step 2: Convert to fraction form
    82,360.20/123,540.30 = 72,190.65/x
  3. Step 3: Cross multiply
    82,360.20x = 123,540.30 × 72,190.65
  4. Step 4: Simplify right side
    82,360.20x = 8,918,454,558.20
  5. Step 5: Solve for x
    x = 8,918,454,558.20/82,360.20
  6. Step 6: Final answer
    x = 108,285.98

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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.