Finding the Fourth Proportional to 138,911.44, 208,376.88 and 68,771.92
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Solution
The fourth proportional to 138,911.44, 208,376.88 and 68,771.92 is: 103,162.69
Step by Step Solution
- Step 1: Write the proportion equation
138,911.44 : 208,376.88 = 68,771.92 : x - Step 2: Convert to fraction form
138,911.44/208,376.88 = 68,771.92/x - Step 3: Cross multiply
138,911.44x = 208,376.88 × 68,771.92 - Step 4: Simplify right side
138,911.44x = 14,330,478,121.21 - Step 5: Solve for x
x = 14,330,478,121.21/138,911.44 - Step 6: Final answer
x = 103,162.69
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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.