Finding the Fourth Proportional to 203,930.70, 305,896.05 and 128,643.23
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Solution
The fourth proportional to 203,930.70, 305,896.05 and 128,643.23 is: 192,964.84
Step by Step Solution
- Step 1: Write the proportion equation
203,930.70 : 305,896.05 = 128,643.23 : x - Step 2: Convert to fraction form
203,930.70/305,896.05 = 128,643.23/x - Step 3: Cross multiply
203,930.70x = 305,896.05 × 128,643.23 - Step 4: Simplify right side
203,930.70x = 39,351,454,386.76 - Step 5: Solve for x
x = 39,351,454,386.76/203,930.70 - Step 6: Final answer
x = 192,964.84
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Similar ratio
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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.