Higher sales would partly be responsible for a 19 percent rise in the estimated Q4 profits of Saudi Arabian Yamama Cement.The company stated that in the quarter ended December 30, estimated net profit of the company was 191 million riyals , an increase from 160 million riyals for the same period a year ago.There was also a Q4 rise in the estimated operating profit of the company by 19 percent to 179 million riyals from 166 million riyals a year ago.