Finding the Fourth Proportional to 209,316.80, 313,975.20 and 84,657.80
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Solution
The fourth proportional to 209,316.80, 313,975.20 and 84,657.80 is: 126,986.70
Step by Step Solution
- Step 1: Write the proportion equation
209,316.80 : 313,975.20 = 84,657.80 : x - Step 2: Convert to fraction form
209,316.80/313,975.20 = 84,657.80/x - Step 3: Cross multiply
209,316.80x = 313,975.20 × 84,657.80 - Step 4: Simplify right side
209,316.80x = 26,580,449,686.56 - Step 5: Solve for x
x = 26,580,449,686.56/209,316.80 - Step 6: Final answer
x = 126,986.70
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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.