Finding the Fourth Proportional to 81.29, 121.95 and 26.44
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Solution
The fourth proportional to 81.29, 121.95 and 26.44 is: 39.66
Step by Step Solution
- Step 1: Write the proportion equation
81.29 : 121.95 = 26.44 : x - Step 2: Convert to fraction form
81.29/121.95 = 26.44/x - Step 3: Cross multiply
81.29x = 121.95 × 26.44 - Step 4: Simplify right side
81.29x = 3,224.36 - Step 5: Solve for x
x = 3,224.36/81.29 - Step 6: Final answer
x = 39.66
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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.