Finding the Fourth Proportional to 198,213.12, 297,365.10 and 85,912.20
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Solution
The fourth proportional to 198,213.12, 297,365.10 and 85,912.20 is: 128,887.99
Step by Step Solution
- Step 1: Write the proportion equation
198,213.12 : 297,365.10 = 85,912.20 : x - Step 2: Convert to fraction form
198,213.12/297,365.10 = 85,912.20/x - Step 3: Cross multiply
198,213.12x = 297,365.10 × 85,912.20 - Step 4: Simplify right side
198,213.12x = 25,547,289,944.22 - Step 5: Solve for x
x = 25,547,289,944.22/198,213.12 - Step 6: Final answer
x = 128,887.99
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1.5x scale
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.