Finding the Fourth Proportional to 212,874.25, 319,311.39 and 86,583.19
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Solution
The fourth proportional to 212,874.25, 319,311.39 and 86,583.19 is: 129,874.79
Step by Step Solution
- Step 1: Write the proportion equation
212,874.25 : 319,311.39 = 86,583.19 : x - Step 2: Convert to fraction form
212,874.25/319,311.39 = 86,583.19/x - Step 3: Cross multiply
212,874.25x = 319,311.39 × 86,583.19 - Step 4: Simplify right side
212,874.25x = 27,646,998,749.53 - Step 5: Solve for x
x = 27,646,998,749.53/212,874.25 - Step 6: Final answer
x = 129,874.79
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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.