Home / 90,626.20-135,939.30-82,169.80

Finding the Fourth Proportional to 90,626.20, 135,939.30 and 82,169.80

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Solution

The fourth proportional to 90,626.20, 135,939.30 and 82,169.80 is: 123,254.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,626.20 : 135,939.30 = 82,169.80 : x
  2. Step 2: Convert to fraction form
    90,626.20/135,939.30 = 82,169.80/x
  3. Step 3: Cross multiply
    90,626.20x = 135,939.30 × 82,169.80
  4. Step 4: Simplify right side
    90,626.20x = 11,170,105,093.14
  5. Step 5: Solve for x
    x = 11,170,105,093.14/90,626.20
  6. Step 6: Final answer
    x = 123,254.70

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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.