def get_highest_value(tuples):
    """
    Returns the tuple with the highest value.

    Args:
        tuples (list): List of tuples containing values to compare.

    Returns:
        tuple: The tuple with the highest value.
    """
    return max(tuples, key=lambda x: x[1])

# Example usage
tuples = [('v5_1768236144', 108217.11959687909, 721, 15009.3),
          ('v5_1768235312', 89435.63603047856, 734, 12184.7),
          ('v5_1768235983', 98379.19963352643, 987, 9967.5)]

print(get_highest_value(tuples))