Finding the Fourth Proportional to 209,609,145.58, 289,261,806.70 and 121,555,424.38
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Solution
The fourth proportional to 209,609,145.58, 289,261,806.70 and 121,555,424.38 is: 167,747,173.31
Step by Step Solution
- Step 1: Write the proportion equation
209,609,145.58 : 289,261,806.70 = 121,555,424.38 : x - Step 2: Convert to fraction form
209,609,145.58/289,261,806.70 = 121,555,424.38/x - Step 3: Cross multiply
209,609,145.58x = 289,261,806.70 × 121,555,424.38 - Step 4: Simplify right side
209,609,145.58x = 35,161,341,670,344,024 - Step 5: Solve for x
x = 35,161,341,670,344,024/209,609,145.58 - Step 6: Final answer
x = 167,747,173.31
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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.