Answer :

Final answer:

The weight of an adult who is 172lbs can be converted to kilograms by using the conversion factor of 0.4536 kg/lb. By multiplying 172 lbs by 0.4536 kg/lb, we find that the person weighs approximately 78.1 kg.

Explanation:

To convert an adult weight from pounds to kilograms, we use a well-known conversion factor. Specifically, a weight of 1 lb is equivalent on Earth to a mass of approximately 0.4536 kg. Hence, if an adult weighs 172 lbs, you can multiply this weight by the conversion factor to obtain the equivalent weight in kilograms.

Step-by-step process:

  1. Identify the weight in pounds that needs to be converted (in this case 172 lbs).
  2. Use the conversion factor of 0.4536 kg/lb.
  3. Multiply the weight in pounds (172 lbs) by the conversion factor (0.4536 kg/lb).

By following these steps, we find that an adult who weighs 172 lbs weighs approximately 78.1 kg when converted into kilograms. Please note that this conversion is rounded to the nearest tenth to align with the level of precision often used in weight and mass measurements.

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