Finding the Fourth Proportional to 161.67, 223.10 and 87.99
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Solution
The fourth proportional to 161.67, 223.10 and 87.99 is: 121.42
Step by Step Solution
- Step 1: Write the proportion equation
161.67 : 223.10 = 87.99 : x - Step 2: Convert to fraction form
161.67/223.10 = 87.99/x - Step 3: Cross multiply
161.67x = 223.10 × 87.99 - Step 4: Simplify right side
161.67x = 19,630.57 - Step 5: Solve for x
x = 19,630.57/161.67 - Step 6: Final answer
x = 121.42
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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.