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Finding the Fourth Proportional to 206,912.80, 310,369.20 and 82,253.80

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Solution

The fourth proportional to 206,912.80, 310,369.20 and 82,253.80 is: 123,380.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,912.80 : 310,369.20 = 82,253.80 : x
  2. Step 2: Convert to fraction form
    206,912.80/310,369.20 = 82,253.80/x
  3. Step 3: Cross multiply
    206,912.80x = 310,369.20 × 82,253.80
  4. Step 4: Simplify right side
    206,912.80x = 25,529,046,102.96
  5. Step 5: Solve for x
    x = 25,529,046,102.96/206,912.80
  6. Step 6: Final answer
    x = 123,380.70

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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.