Finding the Fourth Proportional to 135.12, 186.49 and 84.68
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Solution
The fourth proportional to 135.12, 186.49 and 84.68 is: 116.87
Step by Step Solution
- Step 1: Write the proportion equation
135.12 : 186.49 = 84.68 : x - Step 2: Convert to fraction form
135.12/186.49 = 84.68/x - Step 3: Cross multiply
135.12x = 186.49 × 84.68 - Step 4: Simplify right side
135.12x = 15,791.85 - Step 5: Solve for x
x = 15,791.85/135.12 - Step 6: Final answer
x = 116.87
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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.