Finding the Fourth Proportional to 129,861.97, 179,208.80 and 72,497.97
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Solution
The fourth proportional to 129,861.97, 179,208.80 and 72,497.97 is: 100,046.80
Step by Step Solution
- Step 1: Write the proportion equation
129,861.97 : 179,208.80 = 72,497.97 : x - Step 2: Convert to fraction form
129,861.97/179,208.80 = 72,497.97/x - Step 3: Cross multiply
129,861.97x = 179,208.80 × 72,497.97 - Step 4: Simplify right side
129,861.97x = 12,992,274,206.14 - Step 5: Solve for x
x = 12,992,274,206.14/129,861.97 - Step 6: Final answer
x = 100,046.80
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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.