Finding the Fourth Proportional to 84.26, 126.45 and 66.68
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Solution
The fourth proportional to 84.26, 126.45 and 66.68 is: 100.07
Step by Step Solution
- Step 1: Write the proportion equation
84.26 : 126.45 = 66.68 : x - Step 2: Convert to fraction form
84.26/126.45 = 66.68/x - Step 3: Cross multiply
84.26x = 126.45 × 66.68 - Step 4: Simplify right side
84.26x = 8,431.69 - Step 5: Solve for x
x = 8,431.69/84.26 - Step 6: Final answer
x = 100.07
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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.