Finding the Fourth Proportional to 125,912.40, 188,431.20 and 115,414.80
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Solution
The fourth proportional to 125,912.40, 188,431.20 and 115,414.80 is: 172,721.27
Step by Step Solution
- Step 1: Write the proportion equation
125,912.40 : 188,431.20 = 115,414.80 : x - Step 2: Convert to fraction form
125,912.40/188,431.20 = 115,414.80/x - Step 3: Cross multiply
125,912.40x = 188,431.20 × 115,414.80 - Step 4: Simplify right side
125,912.40x = 21,747,749,261.76 - Step 5: Solve for x
x = 21,747,749,261.76/125,912.40 - Step 6: Final answer
x = 172,721.27
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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.