Finding the Fourth Proportional to 121.14, 181.69 and 47.99
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Solution
The fourth proportional to 121.14, 181.69 and 47.99 is: 71.97
Step by Step Solution
- Step 1: Write the proportion equation
121.14 : 181.69 = 47.99 : x - Step 2: Convert to fraction form
121.14/181.69 = 47.99/x - Step 3: Cross multiply
121.14x = 181.69 × 47.99 - Step 4: Simplify right side
121.14x = 8,718.39 - Step 5: Solve for x
x = 8,718.39/121.14 - Step 6: Final answer
x = 71.97
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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.