Finding the Fourth Proportional to 122.63, 169.23 and 75.99
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Solution
The fourth proportional to 122.63, 169.23 and 75.99 is: 104.87
Step by Step Solution
- Step 1: Write the proportion equation
122.63 : 169.23 = 75.99 : x - Step 2: Convert to fraction form
122.63/169.23 = 75.99/x - Step 3: Cross multiply
122.63x = 169.23 × 75.99 - Step 4: Simplify right side
122.63x = 12,859.79 - Step 5: Solve for x
x = 12,859.79/122.63 - Step 6: Final answer
x = 104.87
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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.