Finding the Fourth Proportional to 198,911.21, 298,129.49 and 138,613.06
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Solution
The fourth proportional to 198,911.21, 298,129.49 and 138,613.06 is: 207,754.20
Step by Step Solution
- Step 1: Write the proportion equation
198,911.21 : 298,129.49 = 138,613.06 : x - Step 2: Convert to fraction form
198,911.21/298,129.49 = 138,613.06/x - Step 3: Cross multiply
198,911.21x = 298,129.49 × 138,613.06 - Step 4: Simplify right side
198,911.21x = 41,324,639,446.75 - Step 5: Solve for x
x = 41,324,639,446.75/198,911.21 - Step 6: Final answer
x = 207,754.20
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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.