Finding the Fourth Proportional to 138,406.36, 207,535.73 and 71,680.99
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Solution
The fourth proportional to 138,406.36, 207,535.73 and 71,680.99 is: 107,483.26
Step by Step Solution
- Step 1: Write the proportion equation
138,406.36 : 207,535.73 = 71,680.99 : x - Step 2: Convert to fraction form
138,406.36/207,535.73 = 71,680.99/x - Step 3: Cross multiply
138,406.36x = 207,535.73 × 71,680.99 - Step 4: Simplify right side
138,406.36x = 14,876,366,586.77 - Step 5: Solve for x
x = 14,876,366,586.77/138,406.36 - Step 6: Final answer
x = 107,483.26
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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.