Finding the Fourth Proportional to 163.15, 225.21 and 107.79
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Solution
The fourth proportional to 163.15, 225.21 and 107.79 is: 148.79
Step by Step Solution
- Step 1: Write the proportion equation
163.15 : 225.21 = 107.79 : x - Step 2: Convert to fraction form
163.15/225.21 = 107.79/x - Step 3: Cross multiply
163.15x = 225.21 × 107.79 - Step 4: Simplify right side
163.15x = 24,274.26 - Step 5: Solve for x
x = 24,274.26/163.15 - Step 6: Final answer
x = 148.79
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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.