Finding the Fourth Proportional to 122.10, 182.97 and 81.02
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Solution
The fourth proportional to 122.10, 182.97 and 81.02 is: 121.40
Step by Step Solution
- Step 1: Write the proportion equation
122.10 : 182.97 = 81.02 : x - Step 2: Convert to fraction form
122.10/182.97 = 81.02/x - Step 3: Cross multiply
122.10x = 182.97 × 81.02 - Step 4: Simplify right side
122.10x = 14,823.31 - Step 5: Solve for x
x = 14,823.31/122.10 - Step 6: Final answer
x = 121.40
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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.