Finding the Fourth Proportional to 86,578.38, 129,890.52 and 27,415.08
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Solution
The fourth proportional to 86,578.38, 129,890.52 and 27,415.08 is: 41,129.89
Step by Step Solution
- Step 1: Write the proportion equation
86,578.38 : 129,890.52 = 27,415.08 : x - Step 2: Convert to fraction form
86,578.38/129,890.52 = 27,415.08/x - Step 3: Cross multiply
86,578.38x = 129,890.52 × 27,415.08 - Step 4: Simplify right side
86,578.38x = 3,560,958,997.04 - Step 5: Solve for x
x = 3,560,958,997.04/86,578.38 - Step 6: Final answer
x = 41,129.89
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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.