Finding the Fourth Proportional to 128,749.80, 193,115.10 and 53,850.60
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Solution
The fourth proportional to 128,749.80, 193,115.10 and 53,850.60 is: 80,771.88
Step by Step Solution
- Step 1: Write the proportion equation
128,749.80 : 193,115.10 = 53,850.60 : x - Step 2: Convert to fraction form
128,749.80/193,115.10 = 53,850.60/x - Step 3: Cross multiply
128,749.80x = 193,115.10 × 53,850.60 - Step 4: Simplify right side
128,749.80x = 10,399,364,004.06 - Step 5: Solve for x
x = 10,399,364,004.06/128,749.80 - Step 6: Final answer
x = 80,771.88
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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.