Finding the Fourth Proportional to 84,021.80, 126,032.70 and 68,469.80
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Solution
The fourth proportional to 84,021.80, 126,032.70 and 68,469.80 is: 102,704.70
Step by Step Solution
- Step 1: Write the proportion equation
84,021.80 : 126,032.70 = 68,469.80 : x - Step 2: Convert to fraction form
84,021.80/126,032.70 = 68,469.80/x - Step 3: Cross multiply
84,021.80x = 126,032.70 × 68,469.80 - Step 4: Simplify right side
84,021.80x = 8,629,433,762.46 - Step 5: Solve for x
x = 8,629,433,762.46/84,021.80 - Step 6: Final answer
x = 102,704.70
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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.