Finding the Fourth Proportional to 126.18, 174.15 and 84.75
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Solution
The fourth proportional to 126.18, 174.15 and 84.75 is: 116.97
Step by Step Solution
- Step 1: Write the proportion equation
126.18 : 174.15 = 84.75 : x - Step 2: Convert to fraction form
126.18/174.15 = 84.75/x - Step 3: Cross multiply
126.18x = 174.15 × 84.75 - Step 4: Simplify right side
126.18x = 14,759.21 - Step 5: Solve for x
x = 14,759.21/126.18 - Step 6: Final answer
x = 116.97
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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.