Finding the Fourth Proportional to 84,905.12, 117,163.92 and 47,178.08
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Solution
The fourth proportional to 84,905.12, 117,163.92 and 47,178.08 is: 65,102.89
Step by Step Solution
- Step 1: Write the proportion equation
84,905.12 : 117,163.92 = 47,178.08 : x - Step 2: Convert to fraction form
84,905.12/117,163.92 = 47,178.08/x - Step 3: Cross multiply
84,905.12x = 117,163.92 × 47,178.08 - Step 4: Simplify right side
84,905.12x = 5,527,568,790.87 - Step 5: Solve for x
x = 5,527,568,790.87/84,905.12 - Step 6: Final answer
x = 65,102.89
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.