Finding the Fourth Proportional to 81.44, 122.21 and 54.44
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Solution
The fourth proportional to 81.44, 122.21 and 54.44 is: 81.69
Step by Step Solution
- Step 1: Write the proportion equation
81.44 : 122.21 = 54.44 : x - Step 2: Convert to fraction form
81.44/122.21 = 54.44/x - Step 3: Cross multiply
81.44x = 122.21 × 54.44 - Step 4: Simplify right side
81.44x = 6,652.23 - Step 5: Solve for x
x = 6,652.23/81.44 - Step 6: Final answer
x = 81.69
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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.