Finding the Fourth Proportional to 129,239.20, 193,858.80 and 66,928.80
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Solution
The fourth proportional to 129,239.20, 193,858.80 and 66,928.80 is: 100,393.20
Step by Step Solution
- Step 1: Write the proportion equation
129,239.20 : 193,858.80 = 66,928.80 : x - Step 2: Convert to fraction form
129,239.20/193,858.80 = 66,928.80/x - Step 3: Cross multiply
129,239.20x = 193,858.80 × 66,928.80 - Step 4: Simplify right side
129,239.20x = 12,974,736,853.44 - Step 5: Solve for x
x = 12,974,736,853.44/129,239.20 - Step 6: Final answer
x = 100,393.20
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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.