Finding the Fourth Proportional to 121.44, 167.68 and 98.08
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Solution
The fourth proportional to 121.44, 167.68 and 98.08 is: 135.43
Step by Step Solution
- Step 1: Write the proportion equation
121.44 : 167.68 = 98.08 : x - Step 2: Convert to fraction form
121.44/167.68 = 98.08/x - Step 3: Cross multiply
121.44x = 167.68 × 98.08 - Step 4: Simplify right side
121.44x = 16,446.05 - Step 5: Solve for x
x = 16,446.05/121.44 - Step 6: Final answer
x = 135.43
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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.