Finding the Fourth Proportional to 212,919.20, 319,366.19 and 79,788.32
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Solution
The fourth proportional to 212,919.20, 319,366.19 and 79,788.32 is: 119,677.75
Step by Step Solution
- Step 1: Write the proportion equation
212,919.20 : 319,366.19 = 79,788.32 : x - Step 2: Convert to fraction form
212,919.20/319,366.19 = 79,788.32/x - Step 3: Cross multiply
212,919.20x = 319,366.19 × 79,788.32 - Step 4: Simplify right side
212,919.20x = 25,481,690,367.54 - Step 5: Solve for x
x = 25,481,690,367.54/212,919.20 - Step 6: Final answer
x = 119,677.75
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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.