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Finding the Fourth Proportional to 206,954.20, 310,485.30 and 66,716.20

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Solution

The fourth proportional to 206,954.20, 310,485.30 and 66,716.20 is: 100,091.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,954.20 : 310,485.30 = 66,716.20 : x
  2. Step 2: Convert to fraction form
    206,954.20/310,485.30 = 66,716.20/x
  3. Step 3: Cross multiply
    206,954.20x = 310,485.30 × 66,716.20
  4. Step 4: Simplify right side
    206,954.20x = 20,714,399,371.86
  5. Step 5: Solve for x
    x = 20,714,399,371.86/206,954.20
  6. Step 6: Final answer
    x = 100,091.71

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.