Finding the Fourth Proportional to 231,768.81, 319,814.53 and 129,780.09
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Solution
The fourth proportional to 231,768.81, 319,814.53 and 129,780.09 is: 179,081.72
Step by Step Solution
- Step 1: Write the proportion equation
231,768.81 : 319,814.53 = 129,780.09 : x - Step 2: Convert to fraction form
231,768.81/319,814.53 = 129,780.09/x - Step 3: Cross multiply
231,768.81x = 319,814.53 × 129,780.09 - Step 4: Simplify right side
231,768.81x = 41,505,558,162.26 - Step 5: Solve for x
x = 41,505,558,162.26/231,768.81 - Step 6: Final answer
x = 179,081.72
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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.