It would be difficult to tell you the exact about 2019 as JEE Main is being conducted twice by NTA for the first time and rank will be based on NTA percentile.
However you can prefer the below given link to check the previous year fourth round cutoff with the given below link.
https://images.careers360.mobi/sites/default/files/JAC-Chandigarh-B.tech-Cutoff-round-4-2018.pdf.pdf
Good Luck!
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