Finding the Fourth Proportional to 81.09, 121.60 and 26.23
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Solution
The fourth proportional to 81.09, 121.60 and 26.23 is: 39.33
Step by Step Solution
- Step 1: Write the proportion equation
81.09 : 121.60 = 26.23 : x - Step 2: Convert to fraction form
81.09/121.60 = 26.23/x - Step 3: Cross multiply
81.09x = 121.60 × 26.23 - Step 4: Simplify right side
81.09x = 3,189.57 - Step 5: Solve for x
x = 3,189.57/81.09 - Step 6: Final answer
x = 39.33
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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.