Finding the Fourth Proportional to 128,124.70, 192,205.43 and 39,385.66
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Solution
The fourth proportional to 128,124.70, 192,205.43 and 39,385.66 is: 59,084.14
Step by Step Solution
- Step 1: Write the proportion equation
128,124.70 : 192,205.43 = 39,385.66 : x - Step 2: Convert to fraction form
128,124.70/192,205.43 = 39,385.66/x - Step 3: Cross multiply
128,124.70x = 192,205.43 × 39,385.66 - Step 4: Simplify right side
128,124.70x = 7,570,137,716.13 - Step 5: Solve for x
x = 7,570,137,716.13/128,124.70 - Step 6: Final answer
x = 59,084.14
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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.