Finding the Fourth Proportional to 144.18, 198.68 and 122.31
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Solution
The fourth proportional to 144.18, 198.68 and 122.31 is: 168.54
Step by Step Solution
- Step 1: Write the proportion equation
144.18 : 198.68 = 122.31 : x - Step 2: Convert to fraction form
144.18/198.68 = 122.31/x - Step 3: Cross multiply
144.18x = 198.68 × 122.31 - Step 4: Simplify right side
144.18x = 24,299.19 - Step 5: Solve for x
x = 24,299.19/144.18 - Step 6: Final answer
x = 168.54
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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.