Finding the Fourth Proportional to 209,547.11, 289,181.27 and 129,021.09
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Solution
The fourth proportional to 209,547.11, 289,181.27 and 129,021.09 is: 178,052.96
Step by Step Solution
- Step 1: Write the proportion equation
209,547.11 : 289,181.27 = 129,021.09 : x - Step 2: Convert to fraction form
209,547.11/289,181.27 = 129,021.09/x - Step 3: Cross multiply
209,547.11x = 289,181.27 × 129,021.09 - Step 4: Simplify right side
209,547.11x = 37,310,482,662.98 - Step 5: Solve for x
x = 37,310,482,662.98/209,547.11 - Step 6: Final answer
x = 178,052.96
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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.