Finding the Fourth Proportional to 138.92, 207.36 and 125.90
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Solution
The fourth proportional to 138.92, 207.36 and 125.90 is: 187.94
Step by Step Solution
- Step 1: Write the proportion equation
138.92 : 207.36 = 125.90 : x - Step 2: Convert to fraction form
138.92/207.36 = 125.90/x - Step 3: Cross multiply
138.92x = 207.36 × 125.90 - Step 4: Simplify right side
138.92x = 26,107.53 - Step 5: Solve for x
x = 26,107.53/138.92 - Step 6: Final answer
x = 187.94
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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.