Finding the Fourth Proportional to 122.27, 168.68 and 80.82
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Solution
The fourth proportional to 122.27, 168.68 and 80.82 is: 111.50
Step by Step Solution
- Step 1: Write the proportion equation
122.27 : 168.68 = 80.82 : x - Step 2: Convert to fraction form
122.27/168.68 = 80.82/x - Step 3: Cross multiply
122.27x = 168.68 × 80.82 - Step 4: Simplify right side
122.27x = 13,632.31 - Step 5: Solve for x
x = 13,632.31/122.27 - Step 6: Final answer
x = 111.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.