Finding the Fourth Proportional to 206,201.20, 309,121.80 and 79,927.60
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Solution
The fourth proportional to 206,201.20, 309,121.80 and 79,927.60 is: 119,821.63
Step by Step Solution
- Step 1: Write the proportion equation
206,201.20 : 309,121.80 = 79,927.60 : x - Step 2: Convert to fraction form
206,201.20/309,121.80 = 79,927.60/x - Step 3: Cross multiply
206,201.20x = 309,121.80 × 79,927.60 - Step 4: Simplify right side
206,201.20x = 24,707,363,581.68 - Step 5: Solve for x
x = 24,707,363,581.68/206,201.20 - Step 6: Final answer
x = 119,821.63
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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.