Finding the Fourth Proportional to 129,489,878.40, 194,203,713.60 and 74,784,163.20
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Solution
The fourth proportional to 129,489,878.40, 194,203,713.60 and 74,784,163.20 is: 112,158,281.34
Step by Step Solution
- Step 1: Write the proportion equation
129,489,878.40 : 194,203,713.60 = 74,784,163.20 : x - Step 2: Convert to fraction form
129,489,878.40/194,203,713.60 = 74,784,163.20/x - Step 3: Cross multiply
129,489,878.40x = 194,203,713.60 × 74,784,163.20 - Step 4: Simplify right side
129,489,878.40x = 14,523,362,211,908,460 - Step 5: Solve for x
x = 14,523,362,211,908,460/129,489,878.40 - Step 6: Final answer
x = 112,158,281.34
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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.