Finding the Fourth Proportional to 126.70, 174.68 and 91.68
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Solution
The fourth proportional to 126.70, 174.68 and 91.68 is: 126.40
Step by Step Solution
- Step 1: Write the proportion equation
126.70 : 174.68 = 91.68 : x - Step 2: Convert to fraction form
126.70/174.68 = 91.68/x - Step 3: Cross multiply
126.70x = 174.68 × 91.68 - Step 4: Simplify right side
126.70x = 16,014.66 - Step 5: Solve for x
x = 16,014.66/126.70 - Step 6: Final answer
x = 126.40
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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.