Finding the Fourth Proportional to 128,555,529.12, 177,417,571.40 and 72,810,866.06
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Solution
The fourth proportional to 128,555,529.12, 177,417,571.40 and 72,810,866.06 is: 100,485,192.01
Step by Step Solution
- Step 1: Write the proportion equation
128,555,529.12 : 177,417,571.40 = 72,810,866.06 : x - Step 2: Convert to fraction form
128,555,529.12/177,417,571.40 = 72,810,866.06/x - Step 3: Cross multiply
128,555,529.12x = 177,417,571.40 × 72,810,866.06 - Step 4: Simplify right side
128,555,529.12x = 12,917,927,027,895,888 - Step 5: Solve for x
x = 12,917,927,027,895,888/128,555,529.12 - Step 6: Final answer
x = 100,485,192.01
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.