Finding the Fourth Proportional to 76,682.20, 115,217.70 and 68,128.60
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Solution
The fourth proportional to 76,682.20, 115,217.70 and 68,128.60 is: 102,365.62
Step by Step Solution
- Step 1: Write the proportion equation
76,682.20 : 115,217.70 = 68,128.60 : x - Step 2: Convert to fraction form
76,682.20/115,217.70 = 68,128.60/x - Step 3: Cross multiply
76,682.20x = 115,217.70 × 68,128.60 - Step 4: Simplify right side
76,682.20x = 7,849,620,596.22 - Step 5: Solve for x
x = 7,849,620,596.22/76,682.20 - Step 6: Final answer
x = 102,365.62
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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.