Finding the Fourth Proportional to 81.24, 122.02 and 73.68
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Solution
The fourth proportional to 81.24, 122.02 and 73.68 is: 110.67
Step by Step Solution
- Step 1: Write the proportion equation
81.24 : 122.02 = 73.68 : x - Step 2: Convert to fraction form
81.24/122.02 = 73.68/x - Step 3: Cross multiply
81.24x = 122.02 × 73.68 - Step 4: Simplify right side
81.24x = 8,990.43 - Step 5: Solve for x
x = 8,990.43/81.24 - Step 6: Final answer
x = 110.67
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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.