Finding the Fourth Proportional to 67,621.20, 101,431.80 and 66,163.20
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Solution
The fourth proportional to 67,621.20, 101,431.80 and 66,163.20 is: 99,244.80
Step by Step Solution
- Step 1: Write the proportion equation
67,621.20 : 101,431.80 = 66,163.20 : x - Step 2: Convert to fraction form
67,621.20/101,431.80 = 66,163.20/x - Step 3: Cross multiply
67,621.20x = 101,431.80 × 66,163.20 - Step 4: Simplify right side
67,621.20x = 6,711,052,469.76 - Step 5: Solve for x
x = 6,711,052,469.76/67,621.20 - Step 6: Final answer
x = 99,244.80
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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.