Through his “purpose-inspired growth strategy,” P&G chief Bob McDonald wants to touch the lives of more consumers in more parts of the world. His goal: finding 800 million new customers by 2015.To do that, McDonald is shifting P&G’s sights to emerging markets in Africa and Asia, where sales growth runs a lot higher than in developed nations. One early success: Brazil. Since entering the South American market two years ago, P&G’s share of the toothpaste business has topped 70%. Today, sales from developing markets account for a third of P&G’s total revenue, up from 20% a decade ago. —P.N.