Finding the Fourth Proportional to 128,628,129.80, 192,942,194.70 and 74,208,571.40
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Solution
The fourth proportional to 128,628,129.80, 192,942,194.70 and 74,208,571.40 is: 111,312,857.10
Step by Step Solution
- Step 1: Write the proportion equation
128,628,129.80 : 192,942,194.70 = 74,208,571.40 : x - Step 2: Convert to fraction form
128,628,129.80/192,942,194.70 = 74,208,571.40/x - Step 3: Cross multiply
128,628,129.80x = 192,942,194.70 × 74,208,571.40 - Step 4: Simplify right side
128,628,129.80x = 14,317,964,631,467,652 - Step 5: Solve for x
x = 14,317,964,631,467,652/128,628,129.80 - Step 6: Final answer
x = 111,312,857.10
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.