Finding the Fourth Proportional to 163.80, 245.70 and 115.80
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Solution
The fourth proportional to 163.80, 245.70 and 115.80 is: 173.70
Step by Step Solution
- Step 1: Write the proportion equation
163.80 : 245.70 = 115.80 : x - Step 2: Convert to fraction form
163.80/245.70 = 115.80/x - Step 3: Cross multiply
163.80x = 245.70 × 115.80 - Step 4: Simplify right side
163.80x = 28,452.06 - Step 5: Solve for x
x = 28,452.06/163.80 - Step 6: Final answer
x = 173.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.