The average weight of four dogs is 40.1 kilograms. The first dog weighs 37.6 kilograms, the second dog weighs 42.7 kilograms, and the third dog weighs 40.3 kilograms. How much does the fourth dog weigh?

To find the weight of the fourth dog, we first need to add up the weights of the first three dogs:

37.6 + 42.7 + 40.3 = 120.6

Now, we know that the average weight of all four dogs is 40.1 kilograms. Therefore, to find the weight of the fourth dog, we can subtract the total weight of the first three dogs from the total weight of all four dogs:

Total weight of all four dogs = 40.1 * 4 = 160.4

Weight of the fourth dog = Total weight of all four dogs - Total weight of first three dogs
Weight of the fourth dog = 160.4 - 120.6
Weight of the fourth dog = 39.8 kilograms

So, the fourth dog weighs 39.8 kilograms.