Finding the Fourth Proportional to 87,986.74, 131,994.09 and 31,821.09
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Solution
The fourth proportional to 87,986.74, 131,994.09 and 31,821.09 is: 47,736.69
Step by Step Solution
- Step 1: Write the proportion equation
87,986.74 : 131,994.09 = 31,821.09 : x - Step 2: Convert to fraction form
87,986.74/131,994.09 = 31,821.09/x - Step 3: Cross multiply
87,986.74x = 131,994.09 × 31,821.09 - Step 4: Simplify right side
87,986.74x = 4,200,195,817.36 - Step 5: Solve for x
x = 4,200,195,817.36/87,986.74 - Step 6: Final answer
x = 47,736.69
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1.5x scale
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.