Finding the Fourth Proportional to 128,428.24, 192,571.68 and 39,657.28
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Solution
The fourth proportional to 128,428.24, 192,571.68 and 39,657.28 is: 59,464.09
Step by Step Solution
- Step 1: Write the proportion equation
128,428.24 : 192,571.68 = 39,657.28 : x - Step 2: Convert to fraction form
128,428.24/192,571.68 = 39,657.28/x - Step 3: Cross multiply
128,428.24x = 192,571.68 × 39,657.28 - Step 4: Simplify right side
128,428.24x = 7,636,869,033.83 - Step 5: Solve for x
x = 7,636,869,033.83/128,428.24 - Step 6: Final answer
x = 59,464.09
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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.