Finding the Fourth Proportional to 84.08, 115.36 and 81.44
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Solution
The fourth proportional to 84.08, 115.36 and 81.44 is: 111.74
Step by Step Solution
- Step 1: Write the proportion equation
84.08 : 115.36 = 81.44 : x - Step 2: Convert to fraction form
84.08/115.36 = 81.44/x - Step 3: Cross multiply
84.08x = 115.36 × 81.44 - Step 4: Simplify right side
84.08x = 9,394.92 - Step 5: Solve for x
x = 9,394.92/84.08 - Step 6: Final answer
x = 111.74
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.