Finding the Fourth Proportional to 135.26, 186.76 and 91.68
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Solution
The fourth proportional to 135.26, 186.76 and 91.68 is: 126.59
Step by Step Solution
- Step 1: Write the proportion equation
135.26 : 186.76 = 91.68 : x - Step 2: Convert to fraction form
135.26/186.76 = 91.68/x - Step 3: Cross multiply
135.26x = 186.76 × 91.68 - Step 4: Simplify right side
135.26x = 17,122.16 - Step 5: Solve for x
x = 17,122.16/135.26 - Step 6: Final answer
x = 126.59
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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.