Finding the Fourth Proportional to 129,812.10, 194,718.15 and 79,729.80
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Solution
The fourth proportional to 129,812.10, 194,718.15 and 79,729.80 is: 119,594.70
Step by Step Solution
- Step 1: Write the proportion equation
129,812.10 : 194,718.15 = 79,729.80 : x - Step 2: Convert to fraction form
129,812.10/194,718.15 = 79,729.80/x - Step 3: Cross multiply
129,812.10x = 194,718.15 × 79,729.80 - Step 4: Simplify right side
129,812.10x = 15,524,839,155.87 - Step 5: Solve for x
x = 15,524,839,155.87/129,812.10 - Step 6: Final answer
x = 119,594.70
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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.