Finding the Fourth Proportional to 138,121.21, 207,225.60 and 49,372.75
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Solution
The fourth proportional to 138,121.21, 207,225.60 and 49,372.75 is: 74,074.78
Step by Step Solution
- Step 1: Write the proportion equation
138,121.21 : 207,225.60 = 49,372.75 : x - Step 2: Convert to fraction form
138,121.21/207,225.60 = 49,372.75/x - Step 3: Cross multiply
138,121.21x = 207,225.60 × 49,372.75 - Step 4: Simplify right side
138,121.21x = 10,231,297,742.40 - Step 5: Solve for x
x = 10,231,297,742.40/138,121.21 - Step 6: Final answer
x = 74,074.78
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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.