Finding the Fourth Proportional to 212,679.36, 318,921.84 and 79,461.92
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Solution
The fourth proportional to 212,679.36, 318,921.84 and 79,461.92 is: 119,156.56
Step by Step Solution
- Step 1: Write the proportion equation
212,679.36 : 318,921.84 = 79,461.92 : x - Step 2: Convert to fraction form
212,679.36/318,921.84 = 79,461.92/x - Step 3: Cross multiply
212,679.36x = 318,921.84 × 79,461.92 - Step 4: Simplify right side
212,679.36x = 25,342,141,736.33 - Step 5: Solve for x
x = 25,342,141,736.33/212,679.36 - Step 6: Final answer
x = 119,156.56
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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.