Finding the Fourth Proportional to 121.12, 181.70 and 39.96
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Solution
The fourth proportional to 121.12, 181.70 and 39.96 is: 59.95
Step by Step Solution
- Step 1: Write the proportion equation
121.12 : 181.70 = 39.96 : x - Step 2: Convert to fraction form
121.12/181.70 = 39.96/x - Step 3: Cross multiply
121.12x = 181.70 × 39.96 - Step 4: Simplify right side
121.12x = 7,260.99 - Step 5: Solve for x
x = 7,260.99/121.12 - Step 6: Final answer
x = 59.95
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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.