Finding the Fourth Proportional to 84.09, 115.99 and 54.97
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Solution
The fourth proportional to 84.09, 115.99 and 54.97 is: 75.82
Step by Step Solution
- Step 1: Write the proportion equation
84.09 : 115.99 = 54.97 : x - Step 2: Convert to fraction form
84.09/115.99 = 54.97/x - Step 3: Cross multiply
84.09x = 115.99 × 54.97 - Step 4: Simplify right side
84.09x = 6,375.97 - Step 5: Solve for x
x = 6,375.97/84.09 - Step 6: Final answer
x = 75.82
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.