Finding the Fourth Proportional to 219,716.40, 303,163.92 and 129,087.12
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Solution
The fourth proportional to 219,716.40, 303,163.92 and 129,087.12 is: 178,113.96
Step by Step Solution
- Step 1: Write the proportion equation
219,716.40 : 303,163.92 = 129,087.12 : x - Step 2: Convert to fraction form
219,716.40/303,163.92 = 129,087.12/x - Step 3: Cross multiply
219,716.40x = 303,163.92 × 129,087.12 - Step 4: Simplify right side
219,716.40x = 39,134,557,320.71 - Step 5: Solve for x
x = 39,134,557,320.71/219,716.40 - Step 6: Final answer
x = 178,113.96
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.