Finding the Fourth Proportional to 261,631.20, 392,409.94 and 84,115.65
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Solution
The fourth proportional to 261,631.20, 392,409.94 and 84,115.65 is: 126,161.62
Step by Step Solution
- Step 1: Write the proportion equation
261,631.20 : 392,409.94 = 84,115.65 : x - Step 2: Convert to fraction form
261,631.20/392,409.94 = 84,115.65/x - Step 3: Cross multiply
261,631.20x = 392,409.94 × 84,115.65 - Step 4: Simplify right side
261,631.20x = 33,007,817,169.56 - Step 5: Solve for x
x = 33,007,817,169.56/261,631.20 - Step 6: Final answer
x = 126,161.62
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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.