Finding the Fourth Proportional to 201,911.40, 278,534.70 and 138,310.20
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Solution
The fourth proportional to 201,911.40, 278,534.70 and 138,310.20 is: 190,797.50
Step by Step Solution
- Step 1: Write the proportion equation
201,911.40 : 278,534.70 = 138,310.20 : x - Step 2: Convert to fraction form
201,911.40/278,534.70 = 138,310.20/x - Step 3: Cross multiply
201,911.40x = 278,534.70 × 138,310.20 - Step 4: Simplify right side
201,911.40x = 38,524,190,063.94 - Step 5: Solve for x
x = 38,524,190,063.94/201,911.40 - Step 6: Final answer
x = 190,797.50
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1.5x scale
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.