Finding the Fourth Proportional to 138.25, 207.18 and 92.65
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Solution
The fourth proportional to 138.25, 207.18 and 92.65 is: 138.84
Step by Step Solution
- Step 1: Write the proportion equation
138.25 : 207.18 = 92.65 : x - Step 2: Convert to fraction form
138.25/207.18 = 92.65/x - Step 3: Cross multiply
138.25x = 207.18 × 92.65 - Step 4: Simplify right side
138.25x = 19,195.23 - Step 5: Solve for x
x = 19,195.23/138.25 - Step 6: Final answer
x = 138.84
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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.