Finding the Fourth Proportional to 86,519.20, 129,519.60 and 51,440.80
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Solution
The fourth proportional to 86,519.20, 129,519.60 and 51,440.80 is: 77,007.09
Step by Step Solution
- Step 1: Write the proportion equation
86,519.20 : 129,519.60 = 51,440.80 : x - Step 2: Convert to fraction form
86,519.20/129,519.60 = 51,440.80/x - Step 3: Cross multiply
86,519.20x = 129,519.60 × 51,440.80 - Step 4: Simplify right side
86,519.20x = 6,662,591,839.68 - Step 5: Solve for x
x = 6,662,591,839.68/86,519.20 - Step 6: Final answer
x = 77,007.09
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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.