Finding the Fourth Proportional to 138.40, 207.72 and 133.84
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Solution
The fourth proportional to 138.40, 207.72 and 133.84 is: 200.88
Step by Step Solution
- Step 1: Write the proportion equation
138.40 : 207.72 = 133.84 : x - Step 2: Convert to fraction form
138.40/207.72 = 133.84/x - Step 3: Cross multiply
138.40x = 207.72 × 133.84 - Step 4: Simplify right side
138.40x = 27,801.24 - Step 5: Solve for x
x = 27,801.24/138.40 - Step 6: Final answer
x = 200.88
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.