Finding the Fourth Proportional to 139,626.77, 207,860.84 and 138,796.38
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Solution
The fourth proportional to 139,626.77, 207,860.84 and 138,796.38 is: 206,624.65
Step by Step Solution
- Step 1: Write the proportion equation
139,626.77 : 207,860.84 = 138,796.38 : x - Step 2: Convert to fraction form
139,626.77/207,860.84 = 138,796.38/x - Step 3: Cross multiply
139,626.77x = 207,860.84 × 138,796.38 - Step 4: Simplify right side
139,626.77x = 28,850,331,441.78 - Step 5: Solve for x
x = 28,850,331,441.78/139,626.77 - Step 6: Final answer
x = 206,624.65
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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.