Finding the Fourth Proportional to 143,420,689.80, 215,131,034.70 and 91,764,624.60
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Solution
The fourth proportional to 143,420,689.80, 215,131,034.70 and 91,764,624.60 is: 137,646,936.90
Step by Step Solution
- Step 1: Write the proportion equation
143,420,689.80 : 215,131,034.70 = 91,764,624.60 : x - Step 2: Convert to fraction form
143,420,689.80/215,131,034.70 = 91,764,624.60/x - Step 3: Cross multiply
143,420,689.80x = 215,131,034.70 × 91,764,624.60 - Step 4: Simplify right side
143,420,689.80x = 19,741,418,639,055,072 - Step 5: Solve for x
x = 19,741,418,639,055,072/143,420,689.80 - Step 6: Final answer
x = 137,646,936.90
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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.