Finding the Fourth Proportional to 128,672.66, 192,943.14 and 53,772.34
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Solution
The fourth proportional to 128,672.66, 192,943.14 and 53,772.34 is: 80,630.99
Step by Step Solution
- Step 1: Write the proportion equation
128,672.66 : 192,943.14 = 53,772.34 : x - Step 2: Convert to fraction form
128,672.66/192,943.14 = 53,772.34/x - Step 3: Cross multiply
128,672.66x = 192,943.14 × 53,772.34 - Step 4: Simplify right side
128,672.66x = 10,375,004,124.75 - Step 5: Solve for x
x = 10,375,004,124.75/128,672.66 - Step 6: Final answer
x = 80,630.99
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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.