Finding the Fourth Proportional to 126.24, 174.26 and 81.99
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Solution
The fourth proportional to 126.24, 174.26 and 81.99 is: 113.18
Step by Step Solution
- Step 1: Write the proportion equation
126.24 : 174.26 = 81.99 : x - Step 2: Convert to fraction form
126.24/174.26 = 81.99/x - Step 3: Cross multiply
126.24x = 174.26 × 81.99 - Step 4: Simplify right side
126.24x = 14,288.44 - Step 5: Solve for x
x = 14,288.44/126.24 - Step 6: Final answer
x = 113.18
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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.