Finding the Fourth Proportional to 76,728.34, 115,161.09 and 39,313.90
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Solution
The fourth proportional to 76,728.34, 115,161.09 and 39,313.90 is: 59,005.99
Step by Step Solution
- Step 1: Write the proportion equation
76,728.34 : 115,161.09 = 39,313.90 : x - Step 2: Convert to fraction form
76,728.34/115,161.09 = 39,313.90/x - Step 3: Cross multiply
76,728.34x = 115,161.09 × 39,313.90 - Step 4: Simplify right side
76,728.34x = 4,527,431,576.15 - Step 5: Solve for x
x = 4,527,431,576.15/76,728.34 - Step 6: Final answer
x = 59,005.99
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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.