Finding the Fourth Proportional to 129,479.40, 194,219.10 and 76,861.80
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Solution
The fourth proportional to 129,479.40, 194,219.10 and 76,861.80 is: 115,292.70
Step by Step Solution
- Step 1: Write the proportion equation
129,479.40 : 194,219.10 = 76,861.80 : x - Step 2: Convert to fraction form
129,479.40/194,219.10 = 76,861.80/x - Step 3: Cross multiply
129,479.40x = 194,219.10 × 76,861.80 - Step 4: Simplify right side
129,479.40x = 14,928,029,620.38 - Step 5: Solve for x
x = 14,928,029,620.38/129,479.40 - Step 6: Final answer
x = 115,292.70
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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.