Finding the Fourth Proportional to 122.75, 183.87 and 68.68
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Solution
The fourth proportional to 122.75, 183.87 and 68.68 is: 102.88
Step by Step Solution
- Step 1: Write the proportion equation
122.75 : 183.87 = 68.68 : x - Step 2: Convert to fraction form
122.75/183.87 = 68.68/x - Step 3: Cross multiply
122.75x = 183.87 × 68.68 - Step 4: Simplify right side
122.75x = 12,628.42 - Step 5: Solve for x
x = 12,628.42/122.75 - Step 6: Final answer
x = 102.88
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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.