Finding the Fourth Proportional to 137.99, 207.81 and 121.10
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Solution
The fourth proportional to 137.99, 207.81 and 121.10 is: 182.36
Step by Step Solution
- Step 1: Write the proportion equation
137.99 : 207.81 = 121.10 : x - Step 2: Convert to fraction form
137.99/207.81 = 121.10/x - Step 3: Cross multiply
137.99x = 207.81 × 121.10 - Step 4: Simplify right side
137.99x = 25,164.75 - Step 5: Solve for x
x = 25,164.75/137.99 - Step 6: Final answer
x = 182.36
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.