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Finding the Fourth Proportional to 206,946.80, 310,420.20 and 82,287.80

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Solution

The fourth proportional to 206,946.80, 310,420.20 and 82,287.80 is: 123,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,946.80 : 310,420.20 = 82,287.80 : x
  2. Step 2: Convert to fraction form
    206,946.80/310,420.20 = 82,287.80/x
  3. Step 3: Cross multiply
    206,946.80x = 310,420.20 × 82,287.80
  4. Step 4: Simplify right side
    206,946.80x = 25,543,795,333.56
  5. Step 5: Solve for x
    x = 25,543,795,333.56/206,946.80
  6. Step 6: Final answer
    x = 123,431.70

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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.