Finding the Fourth Proportional to 121.87, 182.99 and 98.81
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Solution
The fourth proportional to 121.87, 182.99 and 98.81 is: 148.36
Step by Step Solution
- Step 1: Write the proportion equation
121.87 : 182.99 = 98.81 : x - Step 2: Convert to fraction form
121.87/182.99 = 98.81/x - Step 3: Cross multiply
121.87x = 182.99 × 98.81 - Step 4: Simplify right side
121.87x = 18,081.24 - Step 5: Solve for x
x = 18,081.24/121.87 - Step 6: Final answer
x = 148.36
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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.