Finding the Fourth Proportional to 129,456.09, 193,935.42 and 79,390.26
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Solution
The fourth proportional to 129,456.09, 193,935.42 and 79,390.26 is: 118,932.86
Step by Step Solution
- Step 1: Write the proportion equation
129,456.09 : 193,935.42 = 79,390.26 : x - Step 2: Convert to fraction form
129,456.09/193,935.42 = 79,390.26/x - Step 3: Cross multiply
129,456.09x = 193,935.42 × 79,390.26 - Step 4: Simplify right side
129,456.09x = 15,396,583,417.01 - Step 5: Solve for x
x = 15,396,583,417.01/129,456.09 - Step 6: Final answer
x = 118,932.86
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.