Finding the Fourth Proportional to 189,678.23, 261,451.94 and 128,405.09
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Solution
The fourth proportional to 189,678.23, 261,451.94 and 128,405.09 is: 176,993.23
Step by Step Solution
- Step 1: Write the proportion equation
189,678.23 : 261,451.94 = 128,405.09 : x - Step 2: Convert to fraction form
189,678.23/261,451.94 = 128,405.09/x - Step 3: Cross multiply
189,678.23x = 261,451.94 × 128,405.09 - Step 4: Simplify right side
189,678.23x = 33,571,760,861.02 - Step 5: Solve for x
x = 33,571,760,861.02/189,678.23 - Step 6: Final answer
x = 176,993.23
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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.