Finding the Fourth Proportional to 122,315.67, 168,723.95 and 76,921.65
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Solution
The fourth proportional to 122,315.67, 168,723.95 and 76,921.65 is: 106,106.80
Step by Step Solution
- Step 1: Write the proportion equation
122,315.67 : 168,723.95 = 76,921.65 : x - Step 2: Convert to fraction form
122,315.67/168,723.95 = 76,921.65/x - Step 3: Cross multiply
122,315.67x = 168,723.95 × 76,921.65 - Step 4: Simplify right side
122,315.67x = 12,978,524,243.91 - Step 5: Solve for x
x = 12,978,524,243.91/122,315.67 - Step 6: Final answer
x = 106,106.80
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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.