Finding the Fourth Proportional to 128,212.20, 192,318.30 and 34,717.80
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Solution
The fourth proportional to 128,212.20, 192,318.30 and 34,717.80 is: 52,076.70
Step by Step Solution
- Step 1: Write the proportion equation
128,212.20 : 192,318.30 = 34,717.80 : x - Step 2: Convert to fraction form
128,212.20/192,318.30 = 34,717.80/x - Step 3: Cross multiply
128,212.20x = 192,318.30 × 34,717.80 - Step 4: Simplify right side
128,212.20x = 6,676,868,275.74 - Step 5: Solve for x
x = 6,676,868,275.74/128,212.20 - Step 6: Final answer
x = 52,076.70
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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.