Home / 90,640.30-135,960.45-82,329.70

Finding the Fourth Proportional to 90,640.30, 135,960.45 and 82,329.70

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Solution

The fourth proportional to 90,640.30, 135,960.45 and 82,329.70 is: 123,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,640.30 : 135,960.45 = 82,329.70 : x
  2. Step 2: Convert to fraction form
    90,640.30/135,960.45 = 82,329.70/x
  3. Step 3: Cross multiply
    90,640.30x = 135,960.45 × 82,329.70
  4. Step 4: Simplify right side
    90,640.30x = 11,193,583,060.37
  5. Step 5: Solve for x
    x = 11,193,583,060.37/90,640.30
  6. Step 6: Final answer
    x = 123,494.55

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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.