Finding the Fourth Proportional to 231,347.40, 319,257.23 and 129,371.70
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Solution
The fourth proportional to 231,347.40, 319,257.23 and 129,371.70 is: 178,531.72
Step by Step Solution
- Step 1: Write the proportion equation
231,347.40 : 319,257.23 = 129,371.70 : x - Step 2: Convert to fraction form
231,347.40/319,257.23 = 129,371.70/x - Step 3: Cross multiply
231,347.40x = 319,257.23 × 129,371.70 - Step 4: Simplify right side
231,347.40x = 41,302,848,339.25 - Step 5: Solve for x
x = 41,302,848,339.25/231,347.40 - Step 6: Final answer
x = 178,531.72
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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.