Finding the Fourth Proportional to 81.22, 121.81 and 23.44
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Solution
The fourth proportional to 81.22, 121.81 and 23.44 is: 35.15
Step by Step Solution
- Step 1: Write the proportion equation
81.22 : 121.81 = 23.44 : x - Step 2: Convert to fraction form
81.22/121.81 = 23.44/x - Step 3: Cross multiply
81.22x = 121.81 × 23.44 - Step 4: Simplify right side
81.22x = 2,855.23 - Step 5: Solve for x
x = 2,855.23/81.22 - Step 6: Final answer
x = 35.15
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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.