Final answer:
A urine output of 360 ml in 8 hours for a 70-kg patient shows a significantly decreased urine output indicative of septic shock progressing to MODS, along with a MAP of 55 mm Hg suggesting poor perfusion.
Step-by-step explanation:
An assessment finding that indicates a 70-kg patient in septic shock is progressing to Multiple Organ Dysfunction Syndrome (MODS) is a urinary output of 360 ml in 8 hours. This indicates that the patient is producing less than the concerned urine output of less than 1 mL/kg body weight/hour, which is cause for concern in a shock situation. Furthermore, a MAP (Mean Arterial Pressure) of 55 mm Hg is also indicative of poor end-organ perfusion and potentially advancing towards MODS.