Finding the Fourth Proportional to 126.21, 174.09 and 84.76
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Solution
The fourth proportional to 126.21, 174.09 and 84.76 is: 116.92
Step by Step Solution
- Step 1: Write the proportion equation
126.21 : 174.09 = 84.76 : x - Step 2: Convert to fraction form
126.21/174.09 = 84.76/x - Step 3: Cross multiply
126.21x = 174.09 × 84.76 - Step 4: Simplify right side
126.21x = 14,755.87 - Step 5: Solve for x
x = 14,755.87/126.21 - Step 6: Final answer
x = 116.92
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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.