Finding the Fourth Proportional to 122.70, 169.36 and 76.08
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Solution
The fourth proportional to 122.70, 169.36 and 76.08 is: 105.01
Step by Step Solution
- Step 1: Write the proportion equation
122.70 : 169.36 = 76.08 : x - Step 2: Convert to fraction form
122.70/169.36 = 76.08/x - Step 3: Cross multiply
122.70x = 169.36 × 76.08 - Step 4: Simplify right side
122.70x = 12,884.91 - Step 5: Solve for x
x = 12,884.91/122.70 - Step 6: Final answer
x = 105.01
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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.