Finding the Fourth Proportional to 157.24, 217.02 and 122.68
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Solution
The fourth proportional to 157.24, 217.02 and 122.68 is: 169.32
Step by Step Solution
- Step 1: Write the proportion equation
157.24 : 217.02 = 122.68 : x - Step 2: Convert to fraction form
157.24/217.02 = 122.68/x - Step 3: Cross multiply
157.24x = 217.02 × 122.68 - Step 4: Simplify right side
157.24x = 26,624.01 - Step 5: Solve for x
x = 26,624.01/157.24 - Step 6: Final answer
x = 169.32
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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.