Finding the Fourth Proportional to 212,390.68, 318,436.28 and 85,993.62
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Solution
The fourth proportional to 212,390.68, 318,436.28 and 85,993.62 is: 128,929.80
Step by Step Solution
- Step 1: Write the proportion equation
212,390.68 : 318,436.28 = 85,993.62 : x - Step 2: Convert to fraction form
212,390.68/318,436.28 = 85,993.62/x - Step 3: Cross multiply
212,390.68x = 318,436.28 × 85,993.62 - Step 4: Simplify right side
212,390.68x = 27,383,488,456.53 - Step 5: Solve for x
x = 27,383,488,456.53/212,390.68 - Step 6: Final answer
x = 128,929.80
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1.5x scale
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.