Home / 90,626.30-135,939.45-82,315.70

Finding the Fourth Proportional to 90,626.30, 135,939.45 and 82,315.70

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Solution

The fourth proportional to 90,626.30, 135,939.45 and 82,315.70 is: 123,473.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,626.30 : 135,939.45 = 82,315.70 : x
  2. Step 2: Convert to fraction form
    90,626.30/135,939.45 = 82,315.70/x
  3. Step 3: Cross multiply
    90,626.30x = 135,939.45 × 82,315.70
  4. Step 4: Simplify right side
    90,626.30x = 11,189,950,984.37
  5. Step 5: Solve for x
    x = 11,189,950,984.37/90,626.30
  6. Step 6: Final answer
    x = 123,473.55

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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.