Finding the Fourth Proportional to 203,902.30, 305,744.10 and 85,439.80
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Solution
The fourth proportional to 203,902.30, 305,744.10 and 85,439.80 is: 128,113.88
Step by Step Solution
- Step 1: Write the proportion equation
203,902.30 : 305,744.10 = 85,439.80 : x - Step 2: Convert to fraction form
203,902.30/305,744.10 = 85,439.80/x - Step 3: Cross multiply
203,902.30x = 305,744.10 × 85,439.80 - Step 4: Simplify right side
203,902.30x = 26,122,714,755.18 - Step 5: Solve for x
x = 26,122,714,755.18/203,902.30 - Step 6: Final answer
x = 128,113.88
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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.