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Finding the Fourth Proportional to 206,968.20, 310,506.30 and 66,730.20

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Solution

The fourth proportional to 206,968.20, 310,506.30 and 66,730.20 is: 100,112.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,968.20 : 310,506.30 = 66,730.20 : x
  2. Step 2: Convert to fraction form
    206,968.20/310,506.30 = 66,730.20/x
  3. Step 3: Cross multiply
    206,968.20x = 310,506.30 × 66,730.20
  4. Step 4: Simplify right side
    206,968.20x = 20,720,147,500.26
  5. Step 5: Solve for x
    x = 20,720,147,500.26/206,968.20
  6. Step 6: Final answer
    x = 100,112.71

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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.