Finding the Fourth Proportional to 126.92, 174.76 and 115.19
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Solution
The fourth proportional to 126.92, 174.76 and 115.19 is: 158.60
Step by Step Solution
- Step 1: Write the proportion equation
126.92 : 174.76 = 115.19 : x - Step 2: Convert to fraction form
126.92/174.76 = 115.19/x - Step 3: Cross multiply
126.92x = 174.76 × 115.19 - Step 4: Simplify right side
126.92x = 20,129.15 - Step 5: Solve for x
x = 20,129.15/126.92 - Step 6: Final answer
x = 158.60
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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.