Finding the Fourth Proportional to 128,469.31, 192,704.00 and 39,720.85
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Solution
The fourth proportional to 128,469.31, 192,704.00 and 39,720.85 is: 59,581.28
Step by Step Solution
- Step 1: Write the proportion equation
128,469.31 : 192,704.00 = 39,720.85 : x - Step 2: Convert to fraction form
128,469.31/192,704.00 = 39,720.85/x - Step 3: Cross multiply
128,469.31x = 192,704.00 × 39,720.85 - Step 4: Simplify right side
128,469.31x = 7,654,365,998.04 - Step 5: Solve for x
x = 7,654,365,998.04/128,469.31 - Step 6: Final answer
x = 59,581.28
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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.