Finding the Fourth Proportional to 67.92, 102.08 and 54.55
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Solution
The fourth proportional to 67.92, 102.08 and 54.55 is: 81.99
Step by Step Solution
- Step 1: Write the proportion equation
67.92 : 102.08 = 54.55 : x - Step 2: Convert to fraction form
67.92/102.08 = 54.55/x - Step 3: Cross multiply
67.92x = 102.08 × 54.55 - Step 4: Simplify right side
67.92x = 5,568.46 - Step 5: Solve for x
x = 5,568.46/67.92 - Step 6: Final answer
x = 81.99
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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.