Finding the Fourth Proportional to 157.44, 217.28 and 91.94
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Solution
The fourth proportional to 157.44, 217.28 and 91.94 is: 126.88
Step by Step Solution
- Step 1: Write the proportion equation
157.44 : 217.28 = 91.94 : x - Step 2: Convert to fraction form
157.44/217.28 = 91.94/x - Step 3: Cross multiply
157.44x = 217.28 × 91.94 - Step 4: Simplify right side
157.44x = 19,975.87 - Step 5: Solve for x
x = 19,975.87/157.44 - Step 6: Final answer
x = 126.88
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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.