Finding the Fourth Proportional to 67,128.71, 100,686.56 and 20,381.99
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Solution
The fourth proportional to 67,128.71, 100,686.56 and 20,381.99 is: 30,571.01
Step by Step Solution
- Step 1: Write the proportion equation
67,128.71 : 100,686.56 = 20,381.99 : x - Step 2: Convert to fraction form
67,128.71/100,686.56 = 20,381.99/x - Step 3: Cross multiply
67,128.71x = 100,686.56 × 20,381.99 - Step 4: Simplify right side
67,128.71x = 2,052,192,357.14 - Step 5: Solve for x
x = 2,052,192,357.14/67,128.71 - Step 6: Final answer
x = 30,571.01
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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.