Finding the Fourth Proportional to 84.96, 126.63 and 81.99
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Solution
The fourth proportional to 84.96, 126.63 and 81.99 is: 122.20
Step by Step Solution
- Step 1: Write the proportion equation
84.96 : 126.63 = 81.99 : x - Step 2: Convert to fraction form
84.96/126.63 = 81.99/x - Step 3: Cross multiply
84.96x = 126.63 × 81.99 - Step 4: Simplify right side
84.96x = 10,382.39 - Step 5: Solve for x
x = 10,382.39/84.96 - Step 6: Final answer
x = 122.20
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.