def floatify_data(data):
    """
    Convert string to float for data that could not be converted.

    Parameters:
    data (list): List of tuples containing target data.

    Returns:
    list: List of tuples with all string values converted to floats.
    """
    return [(t[0], float(t[1]), t[2], t[3]) if isinstance(t[1], str) else t for t in data]