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Finding the Fourth Proportional to 203,928.70, 305,893.05 and 133,069.90

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Solution

The fourth proportional to 203,928.70, 305,893.05 and 133,069.90 is: 199,604.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,928.70 : 305,893.05 = 133,069.90 : x
  2. Step 2: Convert to fraction form
    203,928.70/305,893.05 = 133,069.90/x
  3. Step 3: Cross multiply
    203,928.70x = 305,893.05 × 133,069.90
  4. Step 4: Simplify right side
    203,928.70x = 40,705,157,574.20
  5. Step 5: Solve for x
    x = 40,705,157,574.20/203,928.70
  6. Step 6: Final answer
    x = 199,604.85

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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.