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Finding the Fourth Proportional to 206,999.92, 310,499.89 and 66,758.55

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Solution

The fourth proportional to 206,999.92, 310,499.89 and 66,758.55 is: 100,137.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,999.92 : 310,499.89 = 66,758.55 : x
  2. Step 2: Convert to fraction form
    206,999.92/310,499.89 = 66,758.55/x
  3. Step 3: Cross multiply
    206,999.92x = 310,499.89 × 66,758.55
  4. Step 4: Simplify right side
    206,999.92x = 20,728,522,431.56
  5. Step 5: Solve for x
    x = 20,728,522,431.56/206,999.92
  6. Step 6: Final answer
    x = 100,137.83

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1.5x scale

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.