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Finding the Fourth Proportional to 203,759.98, 305,685.29 and 66,989.25

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Solution

The fourth proportional to 203,759.98, 305,685.29 and 66,989.25 is: 100,498.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,759.98 : 305,685.29 = 66,989.25 : x
  2. Step 2: Convert to fraction form
    203,759.98/305,685.29 = 66,989.25/x
  3. Step 3: Cross multiply
    203,759.98x = 305,685.29 × 66,989.25
  4. Step 4: Simplify right side
    203,759.98x = 20,477,629,340.35
  5. Step 5: Solve for x
    x = 20,477,629,340.35/203,759.98
  6. Step 6: Final answer
    x = 100,498.78

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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.