Finding the Fourth Proportional to 122.65, 169.18 and 87.63
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Solution
The fourth proportional to 122.65, 169.18 and 87.63 is: 120.87
Step by Step Solution
- Step 1: Write the proportion equation
122.65 : 169.18 = 87.63 : x - Step 2: Convert to fraction form
122.65/169.18 = 87.63/x - Step 3: Cross multiply
122.65x = 169.18 × 87.63 - Step 4: Simplify right side
122.65x = 14,825.24 - Step 5: Solve for x
x = 14,825.24/122.65 - Step 6: Final answer
x = 120.87
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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.