Finding the Fourth Proportional to 163.79, 225.87 and 108.53
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Solution
The fourth proportional to 163.79, 225.87 and 108.53 is: 149.66
Step by Step Solution
- Step 1: Write the proportion equation
163.79 : 225.87 = 108.53 : x - Step 2: Convert to fraction form
163.79/225.87 = 108.53/x - Step 3: Cross multiply
163.79x = 225.87 × 108.53 - Step 4: Simplify right side
163.79x = 24,513.13 - Step 5: Solve for x
x = 24,513.13/163.79 - Step 6: Final answer
x = 149.66
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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.