Finding the Fourth Proportional to 81.41, 122.26 and 70.17
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Solution
The fourth proportional to 81.41, 122.26 and 70.17 is: 105.38
Step by Step Solution
- Step 1: Write the proportion equation
81.41 : 122.26 = 70.17 : x - Step 2: Convert to fraction form
81.41/122.26 = 70.17/x - Step 3: Cross multiply
81.41x = 122.26 × 70.17 - Step 4: Simplify right side
81.41x = 8,578.48 - Step 5: Solve for x
x = 8,578.48/81.41 - Step 6: Final answer
x = 105.38
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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.