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Finding the Fourth Proportional to 206,940.30, 310,410.45 and 82,281.30

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Solution

The fourth proportional to 206,940.30, 310,410.45 and 82,281.30 is: 123,421.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,940.30 : 310,410.45 = 82,281.30 : x
  2. Step 2: Convert to fraction form
    206,940.30/310,410.45 = 82,281.30/x
  3. Step 3: Cross multiply
    206,940.30x = 310,410.45 × 82,281.30
  4. Step 4: Simplify right side
    206,940.30x = 25,540,975,359.59
  5. Step 5: Solve for x
    x = 25,540,975,359.59/206,940.30
  6. Step 6: Final answer
    x = 123,421.95

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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.