Finding the Fourth Proportional to 128,143.80, 192,235.68 and 61,571.52
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Solution
The fourth proportional to 128,143.80, 192,235.68 and 61,571.52 is: 92,366.88
Step by Step Solution
- Step 1: Write the proportion equation
128,143.80 : 192,235.68 = 61,571.52 : x - Step 2: Convert to fraction form
128,143.80/192,235.68 = 61,571.52/x - Step 3: Cross multiply
128,143.80x = 192,235.68 × 61,571.52 - Step 4: Simplify right side
128,143.80x = 11,836,243,015.83 - Step 5: Solve for x
x = 11,836,243,015.83/128,143.80 - Step 6: Final answer
x = 92,366.88
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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.