Finding the Fourth Proportional to 138.24, 207.36 and 133.79
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Solution
The fourth proportional to 138.24, 207.36 and 133.79 is: 200.68
Step by Step Solution
- Step 1: Write the proportion equation
138.24 : 207.36 = 133.79 : x - Step 2: Convert to fraction form
138.24/207.36 = 133.79/x - Step 3: Cross multiply
138.24x = 207.36 × 133.79 - Step 4: Simplify right side
138.24x = 27,741.66 - Step 5: Solve for x
x = 27,741.66/138.24 - Step 6: Final answer
x = 200.68
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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.