Finding the Fourth Proportional to 84.91, 126.67 and 76.41
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Solution
The fourth proportional to 84.91, 126.67 and 76.41 is: 113.99
Step by Step Solution
- Step 1: Write the proportion equation
84.91 : 126.67 = 76.41 : x - Step 2: Convert to fraction form
84.91/126.67 = 76.41/x - Step 3: Cross multiply
84.91x = 126.67 × 76.41 - Step 4: Simplify right side
84.91x = 9,678.85 - Step 5: Solve for x
x = 9,678.85/84.91 - Step 6: Final answer
x = 113.99
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.