Finding the Fourth Proportional to 212,919.95, 319,367.31 and 79,789.07
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Solution
The fourth proportional to 212,919.95, 319,367.31 and 79,789.07 is: 119,678.88
Step by Step Solution
- Step 1: Write the proportion equation
212,919.95 : 319,367.31 = 79,789.07 : x - Step 2: Convert to fraction form
212,919.95/319,367.31 = 79,789.07/x - Step 3: Cross multiply
212,919.95x = 319,367.31 × 79,789.07 - Step 4: Simplify right side
212,919.95x = 25,482,020,653.30 - Step 5: Solve for x
x = 25,482,020,653.30/212,919.95 - Step 6: Final answer
x = 119,678.88
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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.