Finding the Fourth Proportional to 128,521.26, 192,790.90 and 39,763.08
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Solution
The fourth proportional to 128,521.26, 192,790.90 and 39,763.08 is: 59,647.41
Step by Step Solution
- Step 1: Write the proportion equation
128,521.26 : 192,790.90 = 39,763.08 : x - Step 2: Convert to fraction form
128,521.26/192,790.90 = 39,763.08/x - Step 3: Cross multiply
128,521.26x = 192,790.90 × 39,763.08 - Step 4: Simplify right side
128,521.26x = 7,665,959,979.97 - Step 5: Solve for x
x = 7,665,959,979.97/128,521.26 - Step 6: Final answer
x = 59,647.41
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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.