Finding the Fourth Proportional to 111.75, 154.22 and 68.08
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Solution
The fourth proportional to 111.75, 154.22 and 68.08 is: 93.95
Step by Step Solution
- Step 1: Write the proportion equation
111.75 : 154.22 = 68.08 : x - Step 2: Convert to fraction form
111.75/154.22 = 68.08/x - Step 3: Cross multiply
111.75x = 154.22 × 68.08 - Step 4: Simplify right side
111.75x = 10,498.96 - Step 5: Solve for x
x = 10,498.96/111.75 - Step 6: Final answer
x = 93.95
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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.