Finding the Fourth Proportional to 128,727.58, 192,839.99 and 61,163.46
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Solution
The fourth proportional to 128,727.58, 192,839.99 and 61,163.46 is: 91,625.75
Step by Step Solution
- Step 1: Write the proportion equation
128,727.58 : 192,839.99 = 61,163.46 : x - Step 2: Convert to fraction form
128,727.58/192,839.99 = 61,163.46/x - Step 3: Cross multiply
128,727.58x = 192,839.99 × 61,163.46 - Step 4: Simplify right side
128,727.58x = 11,794,760,708.95 - Step 5: Solve for x
x = 11,794,760,708.95/128,727.58 - Step 6: Final answer
x = 91,625.75
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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.