Home / 82,408.20-123,612.30-20,078.70

Finding the Fourth Proportional to 82,408.20, 123,612.30 and 20,078.70

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Solution

The fourth proportional to 82,408.20, 123,612.30 and 20,078.70 is: 30,118.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,408.20 : 123,612.30 = 20,078.70 : x
  2. Step 2: Convert to fraction form
    82,408.20/123,612.30 = 20,078.70/x
  3. Step 3: Cross multiply
    82,408.20x = 123,612.30 × 20,078.70
  4. Step 4: Simplify right side
    82,408.20x = 2,481,974,288.01
  5. Step 5: Solve for x
    x = 2,481,974,288.01/82,408.20
  6. Step 6: Final answer
    x = 30,118.05

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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.