Finding the Fourth Proportional to 122.49, 183.63 and 81.84
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Solution
The fourth proportional to 122.49, 183.63 and 81.84 is: 122.69
Step by Step Solution
- Step 1: Write the proportion equation
122.49 : 183.63 = 81.84 : x - Step 2: Convert to fraction form
122.49/183.63 = 81.84/x - Step 3: Cross multiply
122.49x = 183.63 × 81.84 - Step 4: Simplify right side
122.49x = 15,028.28 - Step 5: Solve for x
x = 15,028.28/122.49 - Step 6: Final answer
x = 122.69
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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.