Finding the Fourth Proportional to 81,464.80, 122,197.20 and 71,615.20
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Solution
The fourth proportional to 81,464.80, 122,197.20 and 71,615.20 is: 107,422.80
Step by Step Solution
- Step 1: Write the proportion equation
81,464.80 : 122,197.20 = 71,615.20 : x - Step 2: Convert to fraction form
81,464.80/122,197.20 = 71,615.20/x - Step 3: Cross multiply
81,464.80x = 122,197.20 × 71,615.20 - Step 4: Simplify right side
81,464.80x = 8,751,176,917.44 - Step 5: Solve for x
x = 8,751,176,917.44/81,464.80 - Step 6: Final answer
x = 107,422.80
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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.