Finding the Fourth Proportional to 121,239.09, 167,379.36 and 81,020.97
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Solution
The fourth proportional to 121,239.09, 167,379.36 and 81,020.97 is: 111,855.33
Step by Step Solution
- Step 1: Write the proportion equation
121,239.09 : 167,379.36 = 81,020.97 : x - Step 2: Convert to fraction form
121,239.09/167,379.36 = 81,020.97/x - Step 3: Cross multiply
121,239.09x = 167,379.36 × 81,020.97 - Step 4: Simplify right side
121,239.09x = 13,561,238,105.18 - Step 5: Solve for x
x = 13,561,238,105.18/121,239.09 - Step 6: Final answer
x = 111,855.33
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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.