Finding the Fourth Proportional to 84.26, 126.21 and 51.66
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Solution
The fourth proportional to 84.26, 126.21 and 51.66 is: 77.38
Step by Step Solution
- Step 1: Write the proportion equation
84.26 : 126.21 = 51.66 : x - Step 2: Convert to fraction form
84.26/126.21 = 51.66/x - Step 3: Cross multiply
84.26x = 126.21 × 51.66 - Step 4: Simplify right side
84.26x = 6,520.01 - Step 5: Solve for x
x = 6,520.01/84.26 - Step 6: Final answer
x = 77.38
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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.