Finding the Fourth Proportional to 72,930.62, 100,644.24 and 39,396.62
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Solution
The fourth proportional to 72,930.62, 100,644.24 and 39,396.62 is: 54,367.32
Step by Step Solution
- Step 1: Write the proportion equation
72,930.62 : 100,644.24 = 39,396.62 : x - Step 2: Convert to fraction form
72,930.62/100,644.24 = 39,396.62/x - Step 3: Cross multiply
72,930.62x = 100,644.24 × 39,396.62 - Step 4: Simplify right side
72,930.62x = 3,965,042,375.25 - Step 5: Solve for x
x = 3,965,042,375.25/72,930.62 - Step 6: Final answer
x = 54,367.32
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.