Finding the Fourth Proportional to 139,639.44, 207,879.89 and 138,809.19
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Solution
The fourth proportional to 139,639.44, 207,879.89 and 138,809.19 is: 206,643.90
Step by Step Solution
- Step 1: Write the proportion equation
139,639.44 : 207,879.89 = 138,809.19 : x - Step 2: Convert to fraction form
139,639.44/207,879.89 = 138,809.19/x - Step 3: Cross multiply
139,639.44x = 207,879.89 × 138,809.19 - Step 4: Simplify right side
139,639.44x = 28,855,639,148.19 - Step 5: Solve for x
x = 28,855,639,148.19/139,639.44 - Step 6: Final answer
x = 206,643.90
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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.