Finding the Fourth Proportional to 136,821,608.12, 188,816,272.70 and 74,937,960.88
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Solution
The fourth proportional to 136,821,608.12, 188,816,272.70 and 74,937,960.88 is: 103,415,729.80
Step by Step Solution
- Step 1: Write the proportion equation
136,821,608.12 : 188,816,272.70 = 74,937,960.88 : x - Step 2: Convert to fraction form
136,821,608.12/188,816,272.70 = 74,937,960.88/x - Step 3: Cross multiply
136,821,608.12x = 188,816,272.70 × 74,937,960.88 - Step 4: Simplify right side
136,821,608.12x = 14,149,506,456,253,280 - Step 5: Solve for x
x = 14,149,506,456,253,280/136,821,608.12 - Step 6: Final answer
x = 103,415,729.80
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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.