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Finding the Fourth Proportional to 206,960.20, 310,494.30 and 66,722.20

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Solution

The fourth proportional to 206,960.20, 310,494.30 and 66,722.20 is: 100,100.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,960.20 : 310,494.30 = 66,722.20 : x
  2. Step 2: Convert to fraction form
    206,960.20/310,494.30 = 66,722.20/x
  3. Step 3: Cross multiply
    206,960.20x = 310,494.30 × 66,722.20
  4. Step 4: Simplify right side
    206,960.20x = 20,716,862,783.46
  5. Step 5: Solve for x
    x = 20,716,862,783.46/206,960.20
  6. Step 6: Final answer
    x = 100,100.71

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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.