Finding the Fourth Proportional to 128,348.74, 192,129.00 and 80,740.92
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Solution
The fourth proportional to 128,348.74, 192,129.00 and 80,740.92 is: 120,863.46
Step by Step Solution
- Step 1: Write the proportion equation
128,348.74 : 192,129.00 = 80,740.92 : x - Step 2: Convert to fraction form
128,348.74/192,129.00 = 80,740.92/x - Step 3: Cross multiply
128,348.74x = 192,129.00 × 80,740.92 - Step 4: Simplify right side
128,348.74x = 15,512,672,497.15 - Step 5: Solve for x
x = 15,512,672,497.15/128,348.74 - Step 6: Final answer
x = 120,863.46
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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.