The diameter of the Earth times 108 equals the diameter of the Sun. The diameter of the Sun times 108 equals the distance between the Sun and the Earth. The diameter of the Moon times 108 equals the distance between the Earth and the Moon.
The diameter of the Earth is 12,756 km. The diameter of the Sun is 1,392,700 km. The latter divided by the former is 109.18.
The distance between the Earth and the Sun ranges from 147.1 million to 152.1 million km. Dividing these by the diameter of the Sun yields 105.62 and 109.21, respectively.
The diameter of the Moon is 3,474.8 km. The distance between the Earth and the Moon ranges from 360,000 to 405,000 km. Dividing these by the diameter of the Moon yields 103.60 and 116.55, respectively.
So it is true that these three ratios are sometimes equal, but the one ratio that does not change is approximately equal to 109, not 108.
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