Finding the Fourth Proportional to 66,431,981.20, 99,647,971.80 and 57,184,907.80
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Solution
The fourth proportional to 66,431,981.20, 99,647,971.80 and 57,184,907.80 is: 85,777,361.70
Step by Step Solution
- Step 1: Write the proportion equation
66,431,981.20 : 99,647,971.80 = 57,184,907.80 : x - Step 2: Convert to fraction form
66,431,981.20/99,647,971.80 = 57,184,907.80/x - Step 3: Cross multiply
66,431,981.20x = 99,647,971.80 × 57,184,907.80 - Step 4: Simplify right side
66,431,981.20x = 5,698,360,079,840,000 - Step 5: Solve for x
x = 5,698,360,079,840,000/66,431,981.20 - Step 6: Final answer
x = 85,777,361.70
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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.