Finding the Fourth Proportional to 122.21, 183.45 and 87.88
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Solution
The fourth proportional to 122.21, 183.45 and 87.88 is: 131.92
Step by Step Solution
- Step 1: Write the proportion equation
122.21 : 183.45 = 87.88 : x - Step 2: Convert to fraction form
122.21/183.45 = 87.88/x - Step 3: Cross multiply
122.21x = 183.45 × 87.88 - Step 4: Simplify right side
122.21x = 16,121.59 - Step 5: Solve for x
x = 16,121.59/122.21 - Step 6: Final answer
x = 131.92
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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.