Finding the Fourth Proportional to 129,491.20, 194,121.60 and 76,844.80
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Solution
The fourth proportional to 129,491.20, 194,121.60 and 76,844.80 is: 115,198.84
Step by Step Solution
- Step 1: Write the proportion equation
129,491.20 : 194,121.60 = 76,844.80 : x - Step 2: Convert to fraction form
129,491.20/194,121.60 = 76,844.80/x - Step 3: Cross multiply
129,491.20x = 194,121.60 × 76,844.80 - Step 4: Simplify right side
129,491.20x = 14,917,235,527.68 - Step 5: Solve for x
x = 14,917,235,527.68/129,491.20 - Step 6: Final answer
x = 115,198.84
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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.