Finding the Fourth Proportional to 201,912.40, 278,536.08 and 138,311.20
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Solution
The fourth proportional to 201,912.40, 278,536.08 and 138,311.20 is: 190,798.88
Step by Step Solution
- Step 1: Write the proportion equation
201,912.40 : 278,536.08 = 138,311.20 : x - Step 2: Convert to fraction form
201,912.40/278,536.08 = 138,311.20/x - Step 3: Cross multiply
201,912.40x = 278,536.08 × 138,311.20 - Step 4: Simplify right side
201,912.40x = 38,524,659,468.10 - Step 5: Solve for x
x = 38,524,659,468.10/201,912.40 - Step 6: Final answer
x = 190,798.88
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.