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Finding the Fourth Proportional to 203,891.06, 305,936.82 and 91,650.57

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Solution

The fourth proportional to 203,891.06, 305,936.82 and 91,650.57 is: 137,520.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,891.06 : 305,936.82 = 91,650.57 : x
  2. Step 2: Convert to fraction form
    203,891.06/305,936.82 = 91,650.57/x
  3. Step 3: Cross multiply
    203,891.06x = 305,936.82 × 91,650.57
  4. Step 4: Simplify right side
    203,891.06x = 28,039,283,936.99
  5. Step 5: Solve for x
    x = 28,039,283,936.99/203,891.06
  6. Step 6: Final answer
    x = 137,520.91

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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.