Finding the Fourth Proportional to 209,771.20, 289,476.01 and 128,235.99
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Solution
The fourth proportional to 209,771.20, 289,476.01 and 128,235.99 is: 176,960.63
Step by Step Solution
- Step 1: Write the proportion equation
209,771.20 : 289,476.01 = 128,235.99 : x - Step 2: Convert to fraction form
209,771.20/289,476.01 = 128,235.99/x - Step 3: Cross multiply
209,771.20x = 289,476.01 × 128,235.99 - Step 4: Simplify right side
209,771.20x = 37,121,243,969.43 - Step 5: Solve for x
x = 37,121,243,969.43/209,771.20 - Step 6: Final answer
x = 176,960.63
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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.