Finding the Fourth Proportional to 128,382,988.97, 177,168,524.79 and 73,380,026.45
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Solution
The fourth proportional to 128,382,988.97, 177,168,524.79 and 73,380,026.45 is: 101,264,436.50
Step by Step Solution
- Step 1: Write the proportion equation
128,382,988.97 : 177,168,524.79 = 73,380,026.45 : x - Step 2: Convert to fraction form
128,382,988.97/177,168,524.79 = 73,380,026.45/x - Step 3: Cross multiply
128,382,988.97x = 177,168,524.79 × 73,380,026.45 - Step 4: Simplify right side
128,382,988.97x = 13,000,631,034,311,836 - Step 5: Solve for x
x = 13,000,631,034,311,836/128,382,988.97 - Step 6: Final answer
x = 101,264,436.50
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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.