Finding the Fourth Proportional to 128,794.11, 177,744.96 and 71,451.78
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Solution
The fourth proportional to 128,794.11, 177,744.96 and 71,451.78 is: 98,608.50
Step by Step Solution
- Step 1: Write the proportion equation
128,794.11 : 177,744.96 = 71,451.78 : x - Step 2: Convert to fraction form
128,794.11/177,744.96 = 71,451.78/x - Step 3: Cross multiply
128,794.11x = 177,744.96 × 71,451.78 - Step 4: Simplify right side
128,794.11x = 12,700,193,778.03 - Step 5: Solve for x
x = 12,700,193,778.03/128,794.11 - Step 6: Final answer
x = 98,608.50
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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.