Finding the Fourth Proportional to 138.38, 207.29 and 110.99
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Solution
The fourth proportional to 138.38, 207.29 and 110.99 is: 166.27
Step by Step Solution
- Step 1: Write the proportion equation
138.38 : 207.29 = 110.99 : x - Step 2: Convert to fraction form
138.38/207.29 = 110.99/x - Step 3: Cross multiply
138.38x = 207.29 × 110.99 - Step 4: Simplify right side
138.38x = 23,007.91 - Step 5: Solve for x
x = 23,007.91/138.38 - Step 6: Final answer
x = 166.27
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.