Finding the Fourth Proportional to 203,742.20, 305,699.70 and 128,919.80
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Solution
The fourth proportional to 203,742.20, 305,699.70 and 128,919.80 is: 193,434.37
Step by Step Solution
- Step 1: Write the proportion equation
203,742.20 : 305,699.70 = 128,919.80 : x - Step 2: Convert to fraction form
203,742.20/305,699.70 = 128,919.80/x - Step 3: Cross multiply
203,742.20x = 305,699.70 × 128,919.80 - Step 4: Simplify right side
203,742.20x = 39,410,744,184.06 - Step 5: Solve for x
x = 39,410,744,184.06/203,742.20 - Step 6: Final answer
x = 193,434.37
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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.