Finding the Fourth Proportional to 121.42, 181.99 and 107.92
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Solution
The fourth proportional to 121.42, 181.99 and 107.92 is: 161.76
Step by Step Solution
- Step 1: Write the proportion equation
121.42 : 181.99 = 107.92 : x - Step 2: Convert to fraction form
121.42/181.99 = 107.92/x - Step 3: Cross multiply
121.42x = 181.99 × 107.92 - Step 4: Simplify right side
121.42x = 19,640.36 - Step 5: Solve for x
x = 19,640.36/121.42 - Step 6: Final answer
x = 161.76
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.