RGB to CMYK conversion

Hi,

I need your expertise asap.

Yesterday i have finished a logo for my friend Bob in Corel Draw X4.
Made it in CMYK color mode. Used 3 nuances of green color previously given to me vith RGB values. My Corel change it to CMYK. I sent the file to Bob.
He has Corel Draw X5. When he opened the file and checked the CMYK values he was surprised because they were different from mine.
I immediately found an on-line RGB to CMYK converter to check which data is more valid when i got totally different CMYK values.
Now i am truly worried and don't know what to think.

Here are the values:

BOB

RGB 116/195/101
CMYK 60/0/84/0

RGB 41/171/135
CMYK 80/7/64/0

RGB 144/238/144
CMYK 42/0/63/0



ME

RGB 116/195/101
CMYK 31/0/37/24

RGB 41/171/135
CMYK 51/0/14/33

RGB 144/238/144
CMYK 37/0/37/7



ON LINE CONVERTER

RGB 116/195/101
CMYK 40/0/48/23

RGB 41/171/135
CMYK 76/0/21/33

RGB 144/238/144
CMYK 39/0/39/66


Please help.
Thank you very much.

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