Finding the Fourth Proportional to 138.99, 207.55 and 131.97
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Solution
The fourth proportional to 138.99, 207.55 and 131.97 is: 197.07
Step by Step Solution
- Step 1: Write the proportion equation
138.99 : 207.55 = 131.97 : x - Step 2: Convert to fraction form
138.99/207.55 = 131.97/x - Step 3: Cross multiply
138.99x = 207.55 × 131.97 - Step 4: Simplify right side
138.99x = 27,390.37 - Step 5: Solve for x
x = 27,390.37/138.99 - Step 6: Final answer
x = 197.07
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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.