Finding the Fourth Proportional to 129,163.80, 193,745.70 and 99,639.30
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Solution
The fourth proportional to 129,163.80, 193,745.70 and 99,639.30 is: 149,458.95
Step by Step Solution
- Step 1: Write the proportion equation
129,163.80 : 193,745.70 = 99,639.30 : x - Step 2: Convert to fraction form
129,163.80/193,745.70 = 99,639.30/x - Step 3: Cross multiply
129,163.80x = 193,745.70 × 99,639.30 - Step 4: Simplify right side
129,163.80x = 19,304,685,926.01 - Step 5: Solve for x
x = 19,304,685,926.01/129,163.80 - Step 6: Final answer
x = 149,458.95
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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.