Finding the Fourth Proportional to 122.91, 183.09 and 115.44
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Solution
The fourth proportional to 122.91, 183.09 and 115.44 is: 171.96
Step by Step Solution
- Step 1: Write the proportion equation
122.91 : 183.09 = 115.44 : x - Step 2: Convert to fraction form
122.91/183.09 = 115.44/x - Step 3: Cross multiply
122.91x = 183.09 × 115.44 - Step 4: Simplify right side
122.91x = 21,135.91 - Step 5: Solve for x
x = 21,135.91/122.91 - Step 6: Final answer
x = 171.96
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.