Finding the Fourth Proportional to 163.92, 226.08 and 108.72
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Solution
The fourth proportional to 163.92, 226.08 and 108.72 is: 149.95
Step by Step Solution
- Step 1: Write the proportion equation
163.92 : 226.08 = 108.72 : x - Step 2: Convert to fraction form
163.92/226.08 = 108.72/x - Step 3: Cross multiply
163.92x = 226.08 × 108.72 - Step 4: Simplify right side
163.92x = 24,579.42 - Step 5: Solve for x
x = 24,579.42/163.92 - Step 6: Final answer
x = 149.95
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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.