Finding the Fourth Proportional to 144.12, 198.99 and 91.68
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Solution
The fourth proportional to 144.12, 198.99 and 91.68 is: 126.58
Step by Step Solution
- Step 1: Write the proportion equation
144.12 : 198.99 = 91.68 : x - Step 2: Convert to fraction form
144.12/198.99 = 91.68/x - Step 3: Cross multiply
144.12x = 198.99 × 91.68 - Step 4: Simplify right side
144.12x = 18,243.40 - Step 5: Solve for x
x = 18,243.40/144.12 - Step 6: Final answer
x = 126.58
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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.