Finding the Fourth Proportional to 128,212.18, 192,387.12 and 53,384.02
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Solution
The fourth proportional to 128,212.18, 192,387.12 and 53,384.02 is: 80,104.70
Step by Step Solution
- Step 1: Write the proportion equation
128,212.18 : 192,387.12 = 53,384.02 : x - Step 2: Convert to fraction form
128,212.18/192,387.12 = 53,384.02/x - Step 3: Cross multiply
128,212.18x = 192,387.12 × 53,384.02 - Step 4: Simplify right side
128,212.18x = 10,270,397,861.82 - Step 5: Solve for x
x = 10,270,397,861.82/128,212.18 - Step 6: Final answer
x = 80,104.70
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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.