Finding the Fourth Proportional to 71,866,809.20, 107,800,213.80 and 20,051,311.70
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Solution
The fourth proportional to 71,866,809.20, 107,800,213.80 and 20,051,311.70 is: 30,076,967.55
Step by Step Solution
- Step 1: Write the proportion equation
71,866,809.20 : 107,800,213.80 = 20,051,311.70 : x - Step 2: Convert to fraction form
71,866,809.20/107,800,213.80 = 20,051,311.70/x - Step 3: Cross multiply
71,866,809.20x = 107,800,213.80 × 20,051,311.70 - Step 4: Simplify right side
71,866,809.20x = 2,161,535,688,230,441.25 - Step 5: Solve for x
x = 2,161,535,688,230,441.25/71,866,809.20 - Step 6: Final answer
x = 30,076,967.55
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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.