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Finding the Fourth Proportional to 139,544.87, 192,576.98 and 79,940.39

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Solution

The fourth proportional to 139,544.87, 192,576.98 and 79,940.39 is: 110,320.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,544.87 : 192,576.98 = 79,940.39 : x
  2. Step 2: Convert to fraction form
    139,544.87/192,576.98 = 79,940.39/x
  3. Step 3: Cross multiply
    139,544.87x = 192,576.98 × 79,940.39
  4. Step 4: Simplify right side
    139,544.87x = 15,394,678,123.19
  5. Step 5: Solve for x
    x = 15,394,678,123.19/139,544.87
  6. Step 6: Final answer
    x = 110,320.64

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1.5x scale

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.