Finding the Fourth Proportional to 129,230.20, 193,845.30 and 66,919.80
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Solution
The fourth proportional to 129,230.20, 193,845.30 and 66,919.80 is: 100,379.70
Step by Step Solution
- Step 1: Write the proportion equation
129,230.20 : 193,845.30 = 66,919.80 : x - Step 2: Convert to fraction form
129,230.20/193,845.30 = 66,919.80/x - Step 3: Cross multiply
129,230.20x = 193,845.30 × 66,919.80 - Step 4: Simplify right side
129,230.20x = 12,972,088,706.94 - Step 5: Solve for x
x = 12,972,088,706.94/129,230.20 - Step 6: Final answer
x = 100,379.70
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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.