Finding the Fourth Proportional to 138.21, 207.21 and 134.97
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Solution
The fourth proportional to 138.21, 207.21 and 134.97 is: 202.35
Step by Step Solution
- Step 1: Write the proportion equation
138.21 : 207.21 = 134.97 : x - Step 2: Convert to fraction form
138.21/207.21 = 134.97/x - Step 3: Cross multiply
138.21x = 207.21 × 134.97 - Step 4: Simplify right side
138.21x = 27,966.10 - Step 5: Solve for x
x = 27,966.10/138.21 - Step 6: Final answer
x = 202.35
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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.