Finding the Fourth Proportional to 81.85, 122.74 and 26.99
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Solution
The fourth proportional to 81.85, 122.74 and 26.99 is: 40.48
Step by Step Solution
- Step 1: Write the proportion equation
81.85 : 122.74 = 26.99 : x - Step 2: Convert to fraction form
81.85/122.74 = 26.99/x - Step 3: Cross multiply
81.85x = 122.74 × 26.99 - Step 4: Simplify right side
81.85x = 3,313.36 - Step 5: Solve for x
x = 3,313.36/81.85 - Step 6: Final answer
x = 40.48
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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.