Finding the Fourth Proportional to 212,139.75, 318,361.38 and 77,203.62
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Solution
The fourth proportional to 212,139.75, 318,361.38 and 77,203.62 is: 115,860.66
Step by Step Solution
- Step 1: Write the proportion equation
212,139.75 : 318,361.38 = 77,203.62 : x - Step 2: Convert to fraction form
212,139.75/318,361.38 = 77,203.62/x - Step 3: Cross multiply
212,139.75x = 318,361.38 × 77,203.62 - Step 4: Simplify right side
212,139.75x = 24,578,651,004.20 - Step 5: Solve for x
x = 24,578,651,004.20/212,139.75 - Step 6: Final answer
x = 115,860.66
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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.