Finding the Fourth Proportional to 89.16, 122.92 and 82.68
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Solution
The fourth proportional to 89.16, 122.92 and 82.68 is: 113.99
Step by Step Solution
- Step 1: Write the proportion equation
89.16 : 122.92 = 82.68 : x - Step 2: Convert to fraction form
89.16/122.92 = 82.68/x - Step 3: Cross multiply
89.16x = 122.92 × 82.68 - Step 4: Simplify right side
89.16x = 10,163.03 - Step 5: Solve for x
x = 10,163.03/89.16 - Step 6: Final answer
x = 113.99
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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.