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Finding the Fourth Proportional to 203,859.70, 305,789.55 and 161,869.30

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Solution

The fourth proportional to 203,859.70, 305,789.55 and 161,869.30 is: 242,803.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,859.70 : 305,789.55 = 161,869.30 : x
  2. Step 2: Convert to fraction form
    203,859.70/305,789.55 = 161,869.30/x
  3. Step 3: Cross multiply
    203,859.70x = 305,789.55 × 161,869.30
  4. Step 4: Simplify right side
    203,859.70x = 49,497,940,405.82
  5. Step 5: Solve for x
    x = 49,497,940,405.82/203,859.70
  6. Step 6: Final answer
    x = 242,803.95

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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.