Finding the Fourth Proportional to 206,631.44, 309,947.17 and 81,972.44
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Solution
The fourth proportional to 206,631.44, 309,947.17 and 81,972.44 is: 122,958.66
Step by Step Solution
- Step 1: Write the proportion equation
206,631.44 : 309,947.17 = 81,972.44 : x - Step 2: Convert to fraction form
206,631.44/309,947.17 = 81,972.44/x - Step 3: Cross multiply
206,631.44x = 309,947.17 × 81,972.44 - Step 4: Simplify right side
206,631.44x = 25,407,125,795.99 - Step 5: Solve for x
x = 25,407,125,795.99/206,631.44 - Step 6: Final answer
x = 122,958.66
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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.