Finding the Fourth Proportional to 80,882.81, 121,760.97 and 72,745.09
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Solution
The fourth proportional to 80,882.81, 121,760.97 and 72,745.09 is: 109,510.45
Step by Step Solution
- Step 1: Write the proportion equation
80,882.81 : 121,760.97 = 72,745.09 : x - Step 2: Convert to fraction form
80,882.81/121,760.97 = 72,745.09/x - Step 3: Cross multiply
80,882.81x = 121,760.97 × 72,745.09 - Step 4: Simplify right side
80,882.81x = 8,857,512,721.14 - Step 5: Solve for x
x = 8,857,512,721.14/80,882.81 - Step 6: Final answer
x = 109,510.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.