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Finding the Fourth Proportional to 139,213.80, 208,819.80 and 50,446.62

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Solution

The fourth proportional to 139,213.80, 208,819.80 and 50,446.62 is: 75,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,213.80 : 208,819.80 = 50,446.62 : x
  2. Step 2: Convert to fraction form
    139,213.80/208,819.80 = 50,446.62/x
  3. Step 3: Cross multiply
    139,213.80x = 208,819.80 × 50,446.62
  4. Step 4: Simplify right side
    139,213.80x = 10,534,253,099.08
  5. Step 5: Solve for x
    x = 10,534,253,099.08/139,213.80
  6. Step 6: Final answer
    x = 75,669.60

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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.