Finding the Fourth Proportional to 151,638.76, 209,193.84 and 87,939.66
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Solution
The fourth proportional to 151,638.76, 209,193.84 and 87,939.66 is: 121,317.50
Step by Step Solution
- Step 1: Write the proportion equation
151,638.76 : 209,193.84 = 87,939.66 : x - Step 2: Convert to fraction form
151,638.76/209,193.84 = 87,939.66/x - Step 3: Cross multiply
151,638.76x = 209,193.84 × 87,939.66 - Step 4: Simplify right side
151,638.76x = 18,396,435,163.69 - Step 5: Solve for x
x = 18,396,435,163.69/151,638.76 - Step 6: Final answer
x = 121,317.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.