Finding the Fourth Proportional to 203,873.20, 305,809.80 and 128,093.65
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Solution
The fourth proportional to 203,873.20, 305,809.80 and 128,093.65 is: 192,140.48
Step by Step Solution
- Step 1: Write the proportion equation
203,873.20 : 305,809.80 = 128,093.65 : x - Step 2: Convert to fraction form
203,873.20/305,809.80 = 128,093.65/x - Step 3: Cross multiply
203,873.20x = 305,809.80 × 128,093.65 - Step 4: Simplify right side
203,873.20x = 39,172,293,487.77 - Step 5: Solve for x
x = 39,172,293,487.77/203,873.20 - Step 6: Final answer
x = 192,140.48
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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.