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Finding the Fourth Proportional to 203,947.20, 305,868.96 and 63,720

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Solution

The fourth proportional to 203,947.20, 305,868.96 and 63,720 is: 95,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,947.20 : 305,868.96 = 63,720 : x
  2. Step 2: Convert to fraction form
    203,947.20/305,868.96 = 63,720/x
  3. Step 3: Cross multiply
    203,947.20x = 305,868.96 × 63,720
  4. Step 4: Simplify right side
    203,947.20x = 19,489,970,131.20
  5. Step 5: Solve for x
    x = 19,489,970,131.20/203,947.20
  6. Step 6: Final answer
    x = 95,563.80

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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.