Finding the Fourth Proportional to 135.24, 186.68 and 122.12
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Solution
The fourth proportional to 135.24, 186.68 and 122.12 is: 168.57
Step by Step Solution
- Step 1: Write the proportion equation
135.24 : 186.68 = 122.12 : x - Step 2: Convert to fraction form
135.24/186.68 = 122.12/x - Step 3: Cross multiply
135.24x = 186.68 × 122.12 - Step 4: Simplify right side
135.24x = 22,797.36 - Step 5: Solve for x
x = 22,797.36/135.24 - Step 6: Final answer
x = 168.57
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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.