Finding the Fourth Proportional to 131,442.20, 197,163.30 and 81,675.80
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Solution
The fourth proportional to 131,442.20, 197,163.30 and 81,675.80 is: 122,513.70
Step by Step Solution
- Step 1: Write the proportion equation
131,442.20 : 197,163.30 = 81,675.80 : x - Step 2: Convert to fraction form
131,442.20/197,163.30 = 81,675.80/x - Step 3: Cross multiply
131,442.20x = 197,163.30 × 81,675.80 - Step 4: Simplify right side
131,442.20x = 16,103,470,258.14 - Step 5: Solve for x
x = 16,103,470,258.14/131,442.20 - Step 6: Final answer
x = 122,513.70
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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.