Finding the Fourth Proportional to 231,769.81, 319,815.91 and 129,781.09
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Solution
The fourth proportional to 231,769.81, 319,815.91 and 129,781.09 is: 179,083.11
Step by Step Solution
- Step 1: Write the proportion equation
231,769.81 : 319,815.91 = 129,781.09 : x - Step 2: Convert to fraction form
231,769.81/319,815.91 = 129,781.09/x - Step 3: Cross multiply
231,769.81x = 319,815.91 × 129,781.09 - Step 4: Simplify right side
231,769.81x = 41,506,057,399.14 - Step 5: Solve for x
x = 41,506,057,399.14/231,769.81 - Step 6: Final answer
x = 179,083.11
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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.