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Finding the Fourth Proportional to 139,588.87, 192,626.81 and 82,230.54

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Solution

The fourth proportional to 139,588.87, 192,626.81 and 82,230.54 is: 113,474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,588.87 : 192,626.81 = 82,230.54 : x
  2. Step 2: Convert to fraction form
    139,588.87/192,626.81 = 82,230.54/x
  3. Step 3: Cross multiply
    139,588.87x = 192,626.81 × 82,230.54
  4. Step 4: Simplify right side
    139,588.87x = 15,839,806,880.77
  5. Step 5: Solve for x
    x = 15,839,806,880.77/139,588.87
  6. Step 6: Final answer
    x = 113,474.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.