Finding the Fourth Proportional to 84.26, 126.41 and 51.75
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Solution
The fourth proportional to 84.26, 126.41 and 51.75 is: 77.64
Step by Step Solution
- Step 1: Write the proportion equation
84.26 : 126.41 = 51.75 : x - Step 2: Convert to fraction form
84.26/126.41 = 51.75/x - Step 3: Cross multiply
84.26x = 126.41 × 51.75 - Step 4: Simplify right side
84.26x = 6,541.46 - Step 5: Solve for x
x = 6,541.46/84.26 - Step 6: Final answer
x = 77.64
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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.