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Finding the Fourth Proportional to 208,801.20, 312,983.10 and 82,392.60

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Solution

The fourth proportional to 208,801.20, 312,983.10 and 82,392.60 is: 123,502.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,801.20 : 312,983.10 = 82,392.60 : x
  2. Step 2: Convert to fraction form
    208,801.20/312,983.10 = 82,392.60/x
  3. Step 3: Cross multiply
    208,801.20x = 312,983.10 × 82,392.60
  4. Step 4: Simplify right side
    208,801.20x = 25,787,491,365.06
  5. Step 5: Solve for x
    x = 25,787,491,365.06/208,801.20
  6. Step 6: Final answer
    x = 123,502.60

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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.