Finding the Fourth Proportional to 80,439.20, 110,990.01 and 48,609.80
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Solution
The fourth proportional to 80,439.20, 110,990.01 and 48,609.80 is: 67,071.80
Step by Step Solution
- Step 1: Write the proportion equation
80,439.20 : 110,990.01 = 48,609.80 : x - Step 2: Convert to fraction form
80,439.20/110,990.01 = 48,609.80/x - Step 3: Cross multiply
80,439.20x = 110,990.01 × 48,609.80 - Step 4: Simplify right side
80,439.20x = 5,395,202,188.10 - Step 5: Solve for x
x = 5,395,202,188.10/80,439.20 - Step 6: Final answer
x = 67,071.80
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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.