Finding the Fourth Proportional to 122.62, 169.19 and 79.01
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Solution
The fourth proportional to 122.62, 169.19 and 79.01 is: 109.02
Step by Step Solution
- Step 1: Write the proportion equation
122.62 : 169.19 = 79.01 : x - Step 2: Convert to fraction form
122.62/169.19 = 79.01/x - Step 3: Cross multiply
122.62x = 169.19 × 79.01 - Step 4: Simplify right side
122.62x = 13,367.70 - Step 5: Solve for x
x = 13,367.70/122.62 - Step 6: Final answer
x = 109.02
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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.