Finding the Fourth Proportional to 143,923.20, 198,614.21 and 79,390.99
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Solution
The fourth proportional to 143,923.20, 198,614.21 and 79,390.99 is: 109,559.67
Step by Step Solution
- Step 1: Write the proportion equation
143,923.20 : 198,614.21 = 79,390.99 : x - Step 2: Convert to fraction form
143,923.20/198,614.21 = 79,390.99/x - Step 3: Cross multiply
143,923.20x = 198,614.21 × 79,390.99 - Step 4: Simplify right side
143,923.20x = 15,768,177,940.65 - Step 5: Solve for x
x = 15,768,177,940.65/143,923.20 - Step 6: Final answer
x = 109,559.67
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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.