Finding the Fourth Proportional to 203,418.80, 305,128.20 and 128,769.20
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Solution
The fourth proportional to 203,418.80, 305,128.20 and 128,769.20 is: 193,153.80
Step by Step Solution
- Step 1: Write the proportion equation
203,418.80 : 305,128.20 = 128,769.20 : x - Step 2: Convert to fraction form
203,418.80/305,128.20 = 128,769.20/x - Step 3: Cross multiply
203,418.80x = 305,128.20 × 128,769.20 - Step 4: Simplify right side
203,418.80x = 39,291,114,211.44 - Step 5: Solve for x
x = 39,291,114,211.44/203,418.80 - Step 6: Final answer
x = 193,153.80
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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.