Finding the Fourth Proportional to 79,286.85, 118,929.60 and 20,121.68
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Solution
The fourth proportional to 79,286.85, 118,929.60 and 20,121.68 is: 30,182.35
Step by Step Solution
- Step 1: Write the proportion equation
79,286.85 : 118,929.60 = 20,121.68 : x - Step 2: Convert to fraction form
79,286.85/118,929.60 = 20,121.68/x - Step 3: Cross multiply
79,286.85x = 118,929.60 × 20,121.68 - Step 4: Simplify right side
79,286.85x = 2,393,063,651.05 - Step 5: Solve for x
x = 2,393,063,651.05/79,286.85 - Step 6: Final answer
x = 30,182.35
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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.