Finding the Fourth Proportional to 121.24, 167.21 and 84.45
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Solution
The fourth proportional to 121.24, 167.21 and 84.45 is: 116.48
Step by Step Solution
- Step 1: Write the proportion equation
121.24 : 167.21 = 84.45 : x - Step 2: Convert to fraction form
121.24/167.21 = 84.45/x - Step 3: Cross multiply
121.24x = 167.21 × 84.45 - Step 4: Simplify right side
121.24x = 14,120.88 - Step 5: Solve for x
x = 14,120.88/121.24 - Step 6: Final answer
x = 116.48
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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.