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Finding the Fourth Proportional to 139,709.87, 192,794.25 and 79,276.91

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Solution

The fourth proportional to 139,709.87, 192,794.25 and 79,276.91 is: 109,399.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,709.87 : 192,794.25 = 79,276.91 : x
  2. Step 2: Convert to fraction form
    139,709.87/192,794.25 = 79,276.91/x
  3. Step 3: Cross multiply
    139,709.87x = 192,794.25 × 79,276.91
  4. Step 4: Simplify right side
    139,709.87x = 15,284,131,441.80
  5. Step 5: Solve for x
    x = 15,284,131,441.80/139,709.87
  6. Step 6: Final answer
    x = 109,399.09

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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.