Finding the Fourth Proportional to 135.36, 186.84 and 91.71
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Solution
The fourth proportional to 135.36, 186.84 and 91.71 is: 126.59
Step by Step Solution
- Step 1: Write the proportion equation
135.36 : 186.84 = 91.71 : x - Step 2: Convert to fraction form
135.36/186.84 = 91.71/x - Step 3: Cross multiply
135.36x = 186.84 × 91.71 - Step 4: Simplify right side
135.36x = 17,135.10 - Step 5: Solve for x
x = 17,135.10/135.36 - 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.