Finding the Fourth Proportional to 128,319.87, 192,512.63 and 53,415.12
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Solution
The fourth proportional to 128,319.87, 192,512.63 and 53,415.12 is: 80,136.35
Step by Step Solution
- Step 1: Write the proportion equation
128,319.87 : 192,512.63 = 53,415.12 : x - Step 2: Convert to fraction form
128,319.87/192,512.63 = 53,415.12/x - Step 3: Cross multiply
128,319.87x = 192,512.63 × 53,415.12 - Step 4: Simplify right side
128,319.87x = 10,283,086,088.43 - Step 5: Solve for x
x = 10,283,086,088.43/128,319.87 - Step 6: Final answer
x = 80,136.35
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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.