Finding the Fourth Proportional to 139,162.44, 192,044.16 and 78,731.84
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Solution
The fourth proportional to 139,162.44, 192,044.16 and 78,731.84 is: 108,649.94
Step by Step Solution
- Step 1: Write the proportion equation
139,162.44 : 192,044.16 = 78,731.84 : x - Step 2: Convert to fraction form
139,162.44/192,044.16 = 78,731.84/x - Step 3: Cross multiply
139,162.44x = 192,044.16 × 78,731.84 - Step 4: Simplify right side
139,162.44x = 15,119,990,078.05 - Step 5: Solve for x
x = 15,119,990,078.05/139,162.44 - Step 6: Final answer
x = 108,649.94
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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.