Finding the Fourth Proportional to 122.43, 183.74 and 81.88
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Solution
The fourth proportional to 122.43, 183.74 and 81.88 is: 122.88
Step by Step Solution
- Step 1: Write the proportion equation
122.43 : 183.74 = 81.88 : x - Step 2: Convert to fraction form
122.43/183.74 = 81.88/x - Step 3: Cross multiply
122.43x = 183.74 × 81.88 - Step 4: Simplify right side
122.43x = 15,044.63 - Step 5: Solve for x
x = 15,044.63/122.43 - Step 6: Final answer
x = 122.88
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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.