Finding the Fourth Proportional to 280,107.10, 420,160.65 and 80,409.70
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Solution
The fourth proportional to 280,107.10, 420,160.65 and 80,409.70 is: 120,614.55
Step by Step Solution
- Step 1: Write the proportion equation
280,107.10 : 420,160.65 = 80,409.70 : x - Step 2: Convert to fraction form
280,107.10/420,160.65 = 80,409.70/x - Step 3: Cross multiply
280,107.10x = 420,160.65 × 80,409.70 - Step 4: Simplify right side
280,107.10x = 33,784,991,818.31 - Step 5: Solve for x
x = 33,784,991,818.31/280,107.10 - Step 6: Final answer
x = 120,614.55
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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.