Finding the Fourth Proportional to 128,809.20, 193,286.88 and 49,928.88
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Solution
The fourth proportional to 128,809.20, 193,286.88 and 49,928.88 is: 74,921.65
Step by Step Solution
- Step 1: Write the proportion equation
128,809.20 : 193,286.88 = 49,928.88 : x - Step 2: Convert to fraction form
128,809.20/193,286.88 = 49,928.88/x - Step 3: Cross multiply
128,809.20x = 193,286.88 × 49,928.88 - Step 4: Simplify right side
128,809.20x = 9,650,597,437.09 - Step 5: Solve for x
x = 9,650,597,437.09/128,809.20 - Step 6: Final answer
x = 74,921.65
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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.