Finding the Fourth Proportional to 80,448.75, 120,662.70 and 21,288.99
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Solution
The fourth proportional to 80,448.75, 120,662.70 and 21,288.99 is: 31,930.73
Step by Step Solution
- Step 1: Write the proportion equation
80,448.75 : 120,662.70 = 21,288.99 : x - Step 2: Convert to fraction form
80,448.75/120,662.70 = 21,288.99/x - Step 3: Cross multiply
80,448.75x = 120,662.70 × 21,288.99 - Step 4: Simplify right side
80,448.75x = 2,568,787,013.67 - Step 5: Solve for x
x = 2,568,787,013.67/80,448.75 - Step 6: Final answer
x = 31,930.73
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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.