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Finding the Fourth Proportional to 82,469.80, 123,963.90 and 80,914.60

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Solution

The fourth proportional to 82,469.80, 123,963.90 and 80,914.60 is: 121,626.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,469.80 : 123,963.90 = 80,914.60 : x
  2. Step 2: Convert to fraction form
    82,469.80/123,963.90 = 80,914.60/x
  3. Step 3: Cross multiply
    82,469.80x = 123,963.90 × 80,914.60
  4. Step 4: Simplify right side
    82,469.80x = 10,030,489,382.94
  5. Step 5: Solve for x
    x = 10,030,489,382.94/82,469.80
  6. Step 6: Final answer
    x = 121,626.21

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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.