Finding the Fourth Proportional to 121.21, 167.18 and 84.46
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Solution
The fourth proportional to 121.21, 167.18 and 84.46 is: 116.49
Step by Step Solution
- Step 1: Write the proportion equation
121.21 : 167.18 = 84.46 : x - Step 2: Convert to fraction form
121.21/167.18 = 84.46/x - Step 3: Cross multiply
121.21x = 167.18 × 84.46 - Step 4: Simplify right side
121.21x = 14,119.97 - Step 5: Solve for x
x = 14,119.97/121.21 - Step 6: Final answer
x = 116.49
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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.