Finding the Fourth Proportional to 129,640.70, 194,461.05 and 80,967.80
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Solution
The fourth proportional to 129,640.70, 194,461.05 and 80,967.80 is: 121,451.70
Step by Step Solution
- Step 1: Write the proportion equation
129,640.70 : 194,461.05 = 80,967.80 : x - Step 2: Convert to fraction form
129,640.70/194,461.05 = 80,967.80/x - Step 3: Cross multiply
129,640.70x = 194,461.05 × 80,967.80 - Step 4: Simplify right side
129,640.70x = 15,745,083,404.19 - Step 5: Solve for x
x = 15,745,083,404.19/129,640.70 - Step 6: Final answer
x = 121,451.70
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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.