Finding the Fourth Proportional to 122.99, 169.69 and 83.65
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Solution
The fourth proportional to 122.99, 169.69 and 83.65 is: 115.41
Step by Step Solution
- Step 1: Write the proportion equation
122.99 : 169.69 = 83.65 : x - Step 2: Convert to fraction form
122.99/169.69 = 83.65/x - Step 3: Cross multiply
122.99x = 169.69 × 83.65 - Step 4: Simplify right side
122.99x = 14,194.57 - Step 5: Solve for x
x = 14,194.57/122.99 - Step 6: Final answer
x = 115.41
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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.