Critical financial ratios are applicable to the Boeing company I.e Earning per share Return on investment Price to earning ratio Explanation - As Boeing company is a aerospace company and manufacturer of commercial jetliners defense, space and security system ,service provider of after market support it requires financial ratios, Financial ratios are required for the purpose of evaluating the companies performance and compare its activities to similar businesses in the industry, To know the Boeing company's operating efficiency, its stability and profitability financial ratios needed to be calculated .