Finding the Fourth Proportional to 212,869.70, 318,943.21 and 128,452.49
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Solution
The fourth proportional to 212,869.70, 318,943.21 and 128,452.49 is: 192,460.69
Step by Step Solution
- Step 1: Write the proportion equation
212,869.70 : 318,943.21 = 128,452.49 : x - Step 2: Convert to fraction form
212,869.70/318,943.21 = 128,452.49/x - Step 3: Cross multiply
212,869.70x = 318,943.21 × 128,452.49 - Step 4: Simplify right side
212,869.70x = 40,969,049,493.09 - Step 5: Solve for x
x = 40,969,049,493.09/212,869.70 - Step 6: Final answer
x = 192,460.69
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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.