Finding the Fourth Proportional to 163.24, 225.05 and 121.79
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Solution
The fourth proportional to 163.24, 225.05 and 121.79 is: 167.91
Step by Step Solution
- Step 1: Write the proportion equation
163.24 : 225.05 = 121.79 : x - Step 2: Convert to fraction form
163.24/225.05 = 121.79/x - Step 3: Cross multiply
163.24x = 225.05 × 121.79 - Step 4: Simplify right side
163.24x = 27,408.79 - Step 5: Solve for x
x = 27,408.79/163.24 - Step 6: Final answer
x = 167.91
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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.