Finding the Fourth Proportional to 128,387.39, 177,183.92 and 71,816.99
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Solution
The fourth proportional to 128,387.39, 177,183.92 and 71,816.99 is: 99,112.66
Step by Step Solution
- Step 1: Write the proportion equation
128,387.39 : 177,183.92 = 71,816.99 : x - Step 2: Convert to fraction form
128,387.39/177,183.92 = 71,816.99/x - Step 3: Cross multiply
128,387.39x = 177,183.92 × 71,816.99 - Step 4: Simplify right side
128,387.39x = 12,724,815,104.42 - Step 5: Solve for x
x = 12,724,815,104.42/128,387.39 - Step 6: Final answer
x = 99,112.66
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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.