Finding the Fourth Proportional to 163.22, 224.94 and 121.64
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Solution
The fourth proportional to 163.22, 224.94 and 121.64 is: 167.64
Step by Step Solution
- Step 1: Write the proportion equation
163.22 : 224.94 = 121.64 : x - Step 2: Convert to fraction form
163.22/224.94 = 121.64/x - Step 3: Cross multiply
163.22x = 224.94 × 121.64 - Step 4: Simplify right side
163.22x = 27,361.70 - Step 5: Solve for x
x = 27,361.70/163.22 - Step 6: Final answer
x = 167.64
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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.