Finding the Fourth Proportional to 122.22, 167.19 and 121.70
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Solution
The fourth proportional to 122.22, 167.19 and 121.70 is: 166.47
Step by Step Solution
- Step 1: Write the proportion equation
122.22 : 167.19 = 121.70 : x - Step 2: Convert to fraction form
122.22/167.19 = 121.70/x - Step 3: Cross multiply
122.22x = 167.19 × 121.70 - Step 4: Simplify right side
122.22x = 20,346.19 - Step 5: Solve for x
x = 20,346.19/122.22 - Step 6: Final answer
x = 166.47
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.