Finding the Fourth Proportional to 128,229.12, 192,345.12 and 39,481.92
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Solution
The fourth proportional to 128,229.12, 192,345.12 and 39,481.92 is: 59,223.32
Step by Step Solution
- Step 1: Write the proportion equation
128,229.12 : 192,345.12 = 39,481.92 : x - Step 2: Convert to fraction form
128,229.12/192,345.12 = 39,481.92/x - Step 3: Cross multiply
128,229.12x = 192,345.12 × 39,481.92 - Step 4: Simplify right side
128,229.12x = 7,594,154,640.23 - Step 5: Solve for x
x = 7,594,154,640.23/128,229.12 - Step 6: Final answer
x = 59,223.32
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1.5x scale
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.