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Finding the Fourth Proportional to 203,936.52, 305,948.56 and 85,539.62

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Solution

The fourth proportional to 203,936.52, 305,948.56 and 85,539.62 is: 128,327.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,936.52 : 305,948.56 = 85,539.62 : x
  2. Step 2: Convert to fraction form
    203,936.52/305,948.56 = 85,539.62/x
  3. Step 3: Cross multiply
    203,936.52x = 305,948.56 × 85,539.62
  4. Step 4: Simplify right side
    203,936.52x = 26,170,723,561.95
  5. Step 5: Solve for x
    x = 26,170,723,561.95/203,936.52
  6. Step 6: Final answer
    x = 128,327.79

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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.