Finding the Fourth Proportional to 135,939.70, 203,909.55 and 47,163.70
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Solution
The fourth proportional to 135,939.70, 203,909.55 and 47,163.70 is: 70,745.55
Step by Step Solution
- Step 1: Write the proportion equation
135,939.70 : 203,909.55 = 47,163.70 : x - Step 2: Convert to fraction form
135,939.70/203,909.55 = 47,163.70/x - Step 3: Cross multiply
135,939.70x = 203,909.55 × 47,163.70 - Step 4: Simplify right side
135,939.70x = 9,617,128,843.34 - Step 5: Solve for x
x = 9,617,128,843.34/135,939.70 - Step 6: Final answer
x = 70,745.55
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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.