Finding the Fourth Proportional to 121.24, 181.62 and 66.97
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Solution
The fourth proportional to 121.24, 181.62 and 66.97 is: 100.32
Step by Step Solution
- Step 1: Write the proportion equation
121.24 : 181.62 = 66.97 : x - Step 2: Convert to fraction form
121.24/181.62 = 66.97/x - Step 3: Cross multiply
121.24x = 181.62 × 66.97 - Step 4: Simplify right side
121.24x = 12,162.64 - Step 5: Solve for x
x = 12,162.64/121.24 - Step 6: Final answer
x = 100.32
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.