Finding the Fourth Proportional to 139,163.28, 192,032.40 and 78,738.49
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Solution
The fourth proportional to 139,163.28, 192,032.40 and 78,738.49 is: 108,651.80
Step by Step Solution
- Step 1: Write the proportion equation
139,163.28 : 192,032.40 = 78,738.49 : x - Step 2: Convert to fraction form
139,163.28/192,032.40 = 78,738.49/x - Step 3: Cross multiply
139,163.28x = 192,032.40 × 78,738.49 - Step 4: Simplify right side
139,163.28x = 15,120,341,207.08 - Step 5: Solve for x
x = 15,120,341,207.08/139,163.28 - Step 6: Final answer
x = 108,651.80
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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.