Finding the Fourth Proportional to 209,208,021.80, 313,812,032.70 and 118,508,757.80
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Solution
The fourth proportional to 209,208,021.80, 313,812,032.70 and 118,508,757.80 is: 177,763,136.70
Step by Step Solution
- Step 1: Write the proportion equation
209,208,021.80 : 313,812,032.70 = 118,508,757.80 : x - Step 2: Convert to fraction form
209,208,021.80/313,812,032.70 = 118,508,757.80/x - Step 3: Cross multiply
209,208,021.80x = 313,812,032.70 × 118,508,757.80 - Step 4: Simplify right side
209,208,021.80x = 37,189,474,177,969,976 - Step 5: Solve for x
x = 37,189,474,177,969,976/209,208,021.80 - Step 6: Final answer
x = 177,763,136.70
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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.