Finding the Fourth Proportional to 84.87, 126.96 and 69.48
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Solution
The fourth proportional to 84.87, 126.96 and 69.48 is: 103.94
Step by Step Solution
- Step 1: Write the proportion equation
84.87 : 126.96 = 69.48 : x - Step 2: Convert to fraction form
84.87/126.96 = 69.48/x - Step 3: Cross multiply
84.87x = 126.96 × 69.48 - Step 4: Simplify right side
84.87x = 8,821.18 - Step 5: Solve for x
x = 8,821.18/84.87 - Step 6: Final answer
x = 103.94
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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.