Finding the Fourth Proportional to 86.66, 119.08 and 81.26
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Solution
The fourth proportional to 86.66, 119.08 and 81.26 is: 111.66
Step by Step Solution
- Step 1: Write the proportion equation
86.66 : 119.08 = 81.26 : x - Step 2: Convert to fraction form
86.66/119.08 = 81.26/x - Step 3: Cross multiply
86.66x = 119.08 × 81.26 - Step 4: Simplify right side
86.66x = 9,676.44 - Step 5: Solve for x
x = 9,676.44/86.66 - Step 6: Final answer
x = 111.66
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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.