Finding the Fourth Proportional to 111.68, 167.68 and 73.28
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Solution
The fourth proportional to 111.68, 167.68 and 73.28 is: 110.02
Step by Step Solution
- Step 1: Write the proportion equation
111.68 : 167.68 = 73.28 : x - Step 2: Convert to fraction form
111.68/167.68 = 73.28/x - Step 3: Cross multiply
111.68x = 167.68 × 73.28 - Step 4: Simplify right side
111.68x = 12,287.59 - Step 5: Solve for x
x = 12,287.59/111.68 - Step 6: Final answer
x = 110.02
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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.