Finding the Fourth Proportional to 115,939.68, 159,992.19 and 65,638.68
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Solution
The fourth proportional to 115,939.68, 159,992.19 and 65,638.68 is: 90,578.79
Step by Step Solution
- Step 1: Write the proportion equation
115,939.68 : 159,992.19 = 65,638.68 : x - Step 2: Convert to fraction form
115,939.68/159,992.19 = 65,638.68/x - Step 3: Cross multiply
115,939.68x = 159,992.19 × 65,638.68 - Step 4: Simplify right side
115,939.68x = 10,501,676,161.91 - Step 5: Solve for x
x = 10,501,676,161.91/115,939.68 - Step 6: Final answer
x = 90,578.79
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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.