Finding the Fourth Proportional to 144.21, 198.93 and 91.74
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Solution
The fourth proportional to 144.21, 198.93 and 91.74 is: 126.55
Step by Step Solution
- Step 1: Write the proportion equation
144.21 : 198.93 = 91.74 : x - Step 2: Convert to fraction form
144.21/198.93 = 91.74/x - Step 3: Cross multiply
144.21x = 198.93 × 91.74 - Step 4: Simplify right side
144.21x = 18,249.84 - Step 5: Solve for x
x = 18,249.84/144.21 - Step 6: Final answer
x = 126.55
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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.