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Finding the Fourth Proportional to 203,898.20, 305,847.30 and 161,907.80

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Solution

The fourth proportional to 203,898.20, 305,847.30 and 161,907.80 is: 242,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,898.20 : 305,847.30 = 161,907.80 : x
  2. Step 2: Convert to fraction form
    203,898.20/305,847.30 = 161,907.80/x
  3. Step 3: Cross multiply
    203,898.20x = 305,847.30 × 161,907.80
  4. Step 4: Simplify right side
    203,898.20x = 49,519,063,478.94
  5. Step 5: Solve for x
    x = 49,519,063,478.94/203,898.20
  6. Step 6: Final answer
    x = 242,861.70

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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.