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Finding the Fourth Proportional to 206,871.30, 310,306.95 and 82,212.30

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Solution

The fourth proportional to 206,871.30, 310,306.95 and 82,212.30 is: 123,318.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,871.30 : 310,306.95 = 82,212.30 : x
  2. Step 2: Convert to fraction form
    206,871.30/310,306.95 = 82,212.30/x
  3. Step 3: Cross multiply
    206,871.30x = 310,306.95 × 82,212.30
  4. Step 4: Simplify right side
    206,871.30x = 25,511,048,065.49
  5. Step 5: Solve for x
    x = 25,511,048,065.49/206,871.30
  6. Step 6: Final answer
    x = 123,318.45

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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.