Finding the Fourth Proportional to 138,958.68, 207,939.74 and 120,302.90
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Solution
The fourth proportional to 138,958.68, 207,939.74 and 120,302.90 is: 180,022.97
Step by Step Solution
- Step 1: Write the proportion equation
138,958.68 : 207,939.74 = 120,302.90 : x - Step 2: Convert to fraction form
138,958.68/207,939.74 = 120,302.90/x - Step 3: Cross multiply
138,958.68x = 207,939.74 × 120,302.90 - Step 4: Simplify right side
138,958.68x = 25,015,753,747.25 - Step 5: Solve for x
x = 25,015,753,747.25/138,958.68 - Step 6: Final answer
x = 180,022.97
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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.