document.write( "Question 389539: please answer this.\r
\n" ); document.write( "\n" ); document.write( "The weight W of an object on Mars is directly proportional to its weight B on earth. A man who weights 118.75 kg on earth weights 47.5 kg on Mars. Find the weight of a man on Mars if he weights 98 kg.\r
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Algebra.Com's Answer #276073 by gwendolyn(128)\"\" \"About 
You can put this solution on YOUR website!
If the weights are directly proportional, the ratio (weight on earth):(weight on mars) will always be the same. So, using the data points we are given:\r
\n" ); document.write( "\n" ); document.write( "\"118.75%2F47.5+=+98%2FW\"
\n" ); document.write( "\"2.5+=+98%2FW\"
\n" ); document.write( "Multiply both sides by W to get it out of the denominator:
\n" ); document.write( "\"2.5%2AW+=+%2898%2FW%29%2AW\"\r
\n" ); document.write( "\n" ); document.write( "Cross out the Ws on the left because they are just multiplying by 1:
\n" ); document.write( "2.5*W = 98\r
\n" ); document.write( "\n" ); document.write( "Divide both sides by 2.5 to solve for W:
\n" ); document.write( "\"%282.5%2AW%29%2F2.5+=+98%2F2.5\"
\n" ); document.write( "Cross out the 2.5/2.5 and do the division:
\n" ); document.write( "W = 39.2\r
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