Finding the Fourth Proportional to 128,339.19, 192,469.53 and 45,213.75
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Solution
The fourth proportional to 128,339.19, 192,469.53 and 45,213.75 is: 67,806.80
Step by Step Solution
- Step 1: Write the proportion equation
128,339.19 : 192,469.53 = 45,213.75 : x - Step 2: Convert to fraction form
128,339.19/192,469.53 = 45,213.75/x - Step 3: Cross multiply
128,339.19x = 192,469.53 × 45,213.75 - Step 4: Simplify right side
128,339.19x = 8,702,269,212.04 - Step 5: Solve for x
x = 8,702,269,212.04/128,339.19 - Step 6: Final answer
x = 67,806.80
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1.5x scale
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.