Finding the Fourth Proportional to 129,622.75, 178,879.40 and 70,006.75
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Solution
The fourth proportional to 129,622.75, 178,879.40 and 70,006.75 is: 96,609.32
Step by Step Solution
- Step 1: Write the proportion equation
129,622.75 : 178,879.40 = 70,006.75 : x - Step 2: Convert to fraction form
129,622.75/178,879.40 = 70,006.75/x - Step 3: Cross multiply
129,622.75x = 178,879.40 × 70,006.75 - Step 4: Simplify right side
129,622.75x = 12,522,765,435.95 - Step 5: Solve for x
x = 12,522,765,435.95/129,622.75 - Step 6: Final answer
x = 96,609.32
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.