Finding the Fourth Proportional to 138.26, 207.36 and 73.26
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Solution
The fourth proportional to 138.26, 207.36 and 73.26 is: 109.87
Step by Step Solution
- Step 1: Write the proportion equation
138.26 : 207.36 = 73.26 : x - Step 2: Convert to fraction form
138.26/207.36 = 73.26/x - Step 3: Cross multiply
138.26x = 207.36 × 73.26 - Step 4: Simplify right side
138.26x = 15,191.19 - Step 5: Solve for x
x = 15,191.19/138.26 - Step 6: Final answer
x = 109.87
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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.