Finding the Fourth Proportional to 122.44, 169.08 and 81.04
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Solution
The fourth proportional to 122.44, 169.08 and 81.04 is: 111.91
Step by Step Solution
- Step 1: Write the proportion equation
122.44 : 169.08 = 81.04 : x - Step 2: Convert to fraction form
122.44/169.08 = 81.04/x - Step 3: Cross multiply
122.44x = 169.08 × 81.04 - Step 4: Simplify right side
122.44x = 13,702.24 - Step 5: Solve for x
x = 13,702.24/122.44 - Step 6: Final answer
x = 111.91
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.