Finding the Fourth Proportional to 163.36, 225.36 and 121.84
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Solution
The fourth proportional to 163.36, 225.36 and 121.84 is: 168.08
Step by Step Solution
- Step 1: Write the proportion equation
163.36 : 225.36 = 121.84 : x - Step 2: Convert to fraction form
163.36/225.36 = 121.84/x - Step 3: Cross multiply
163.36x = 225.36 × 121.84 - Step 4: Simplify right side
163.36x = 27,457.86 - Step 5: Solve for x
x = 27,457.86/163.36 - Step 6: Final answer
x = 168.08
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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.