Finding the Fourth Proportional to 86,396.19, 129,665.57 and 66,794.19
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Solution
The fourth proportional to 86,396.19, 129,665.57 and 66,794.19 is: 100,246.39
Step by Step Solution
- Step 1: Write the proportion equation
86,396.19 : 129,665.57 = 66,794.19 : x - Step 2: Convert to fraction form
86,396.19/129,665.57 = 66,794.19/x - Step 3: Cross multiply
86,396.19x = 129,665.57 × 66,794.19 - Step 4: Simplify right side
86,396.19x = 8,660,906,385.07 - Step 5: Solve for x
x = 8,660,906,385.07/86,396.19 - Step 6: Final answer
x = 100,246.39
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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.