Finding the Fourth Proportional to 111.22, 167.01 and 76.99
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Solution
The fourth proportional to 111.22, 167.01 and 76.99 is: 115.61
Step by Step Solution
- Step 1: Write the proportion equation
111.22 : 167.01 = 76.99 : x - Step 2: Convert to fraction form
111.22/167.01 = 76.99/x - Step 3: Cross multiply
111.22x = 167.01 × 76.99 - Step 4: Simplify right side
111.22x = 12,858.10 - Step 5: Solve for x
x = 12,858.10/111.22 - Step 6: Final answer
x = 115.61
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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.