Finding the Fourth Proportional to 138,879.11, 208,275.68 and 50,121.38
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Solution
The fourth proportional to 138,879.11, 208,275.68 and 50,121.38 is: 75,166.55
Step by Step Solution
- Step 1: Write the proportion equation
138,879.11 : 208,275.68 = 50,121.38 : x - Step 2: Convert to fraction form
138,879.11/208,275.68 = 50,121.38/x - Step 3: Cross multiply
138,879.11x = 208,275.68 × 50,121.38 - Step 4: Simplify right side
138,879.11x = 10,439,063,210.05 - Step 5: Solve for x
x = 10,439,063,210.05/138,879.11 - Step 6: Final answer
x = 75,166.55
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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.