Finding the Fourth Proportional to 135.42, 186.66 and 91.68
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Solution
The fourth proportional to 135.42, 186.66 and 91.68 is: 126.37
Step by Step Solution
- Step 1: Write the proportion equation
135.42 : 186.66 = 91.68 : x - Step 2: Convert to fraction form
135.42/186.66 = 91.68/x - Step 3: Cross multiply
135.42x = 186.66 × 91.68 - Step 4: Simplify right side
135.42x = 17,112.99 - Step 5: Solve for x
x = 17,112.99/135.42 - Step 6: Final answer
x = 126.37
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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.