Finding the Fourth Proportional to 138,059.99, 206,819.34 and 71,543.75
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Solution
The fourth proportional to 138,059.99, 206,819.34 and 71,543.75 is: 107,175.37
Step by Step Solution
- Step 1: Write the proportion equation
138,059.99 : 206,819.34 = 71,543.75 : x - Step 2: Convert to fraction form
138,059.99/206,819.34 = 71,543.75/x - Step 3: Cross multiply
138,059.99x = 206,819.34 × 71,543.75 - Step 4: Simplify right side
138,059.99x = 14,796,629,764.31 - Step 5: Solve for x
x = 14,796,629,764.31/138,059.99 - Step 6: Final answer
x = 107,175.37
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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.