Finding the Fourth Proportional to 129,615.75, 194,423.63 and 31,119.75
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Solution
The fourth proportional to 129,615.75, 194,423.63 and 31,119.75 is: 46,679.63
Step by Step Solution
- Step 1: Write the proportion equation
129,615.75 : 194,423.63 = 31,119.75 : x - Step 2: Convert to fraction form
129,615.75/194,423.63 = 31,119.75/x - Step 3: Cross multiply
129,615.75x = 194,423.63 × 31,119.75 - Step 4: Simplify right side
129,615.75x = 6,050,414,759.69 - Step 5: Solve for x
x = 6,050,414,759.69/129,615.75 - Step 6: Final answer
x = 46,679.63
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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.