Finding the Fourth Proportional to 129,609.75, 194,414.63 and 31,113.75
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Solution
The fourth proportional to 129,609.75, 194,414.63 and 31,113.75 is: 46,670.63
Step by Step Solution
- Step 1: Write the proportion equation
129,609.75 : 194,414.63 = 31,113.75 : x - Step 2: Convert to fraction form
129,609.75/194,414.63 = 31,113.75/x - Step 3: Cross multiply
129,609.75x = 194,414.63 × 31,113.75 - Step 4: Simplify right side
129,609.75x = 6,048,968,194.16 - Step 5: Solve for x
x = 6,048,968,194.16/129,609.75 - Step 6: Final answer
x = 46,670.63
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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.