Finding the Fourth Proportional to 212,869.20, 318,942.46 and 128,451.99
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Solution
The fourth proportional to 212,869.20, 318,942.46 and 128,451.99 is: 192,459.94
Step by Step Solution
- Step 1: Write the proportion equation
212,869.20 : 318,942.46 = 128,451.99 : x - Step 2: Convert to fraction form
212,869.20/318,942.46 = 128,451.99/x - Step 3: Cross multiply
212,869.20x = 318,942.46 × 128,451.99 - Step 4: Simplify right side
212,869.20x = 40,968,792,087.78 - Step 5: Solve for x
x = 40,968,792,087.78/212,869.20 - Step 6: Final answer
x = 192,459.94
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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.