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Finding the Fourth Proportional to 139,183.42, 208,756.41 and 39,351.46

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Solution

The fourth proportional to 139,183.42, 208,756.41 and 39,351.46 is: 59,021.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,183.42 : 208,756.41 = 39,351.46 : x
  2. Step 2: Convert to fraction form
    139,183.42/208,756.41 = 39,351.46/x
  3. Step 3: Cross multiply
    139,183.42x = 208,756.41 × 39,351.46
  4. Step 4: Simplify right side
    139,183.42x = 8,214,869,517.86
  5. Step 5: Solve for x
    x = 8,214,869,517.86/139,183.42
  6. Step 6: Final answer
    x = 59,021.90

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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.