Finding the Fourth Proportional to 71,121.75, 106,682.63 and 21,236.88
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Solution
The fourth proportional to 71,121.75, 106,682.63 and 21,236.88 is: 31,855.32
Step by Step Solution
- Step 1: Write the proportion equation
71,121.75 : 106,682.63 = 21,236.88 : x - Step 2: Convert to fraction form
71,121.75/106,682.63 = 21,236.88/x - Step 3: Cross multiply
71,121.75x = 106,682.63 × 21,236.88 - Step 4: Simplify right side
71,121.75x = 2,265,606,249.85 - Step 5: Solve for x
x = 2,265,606,249.85/71,121.75 - Step 6: Final answer
x = 31,855.32
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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.