Finding the Fourth Proportional to 80,721.70, 121,081.33 and 36,317.09
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Solution
The fourth proportional to 80,721.70, 121,081.33 and 36,317.09 is: 54,475.09
Step by Step Solution
- Step 1: Write the proportion equation
80,721.70 : 121,081.33 = 36,317.09 : x - Step 2: Convert to fraction form
80,721.70/121,081.33 = 36,317.09/x - Step 3: Cross multiply
80,721.70x = 121,081.33 × 36,317.09 - Step 4: Simplify right side
80,721.70x = 4,397,321,377.34 - Step 5: Solve for x
x = 4,397,321,377.34/80,721.70 - Step 6: Final answer
x = 54,475.09
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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.