Finding the Fourth Proportional to 128,861.75, 193,214.96 and 57,771.53
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Solution
The fourth proportional to 128,861.75, 193,214.96 and 57,771.53 is: 86,622.47
Step by Step Solution
- Step 1: Write the proportion equation
128,861.75 : 193,214.96 = 57,771.53 : x - Step 2: Convert to fraction form
128,861.75/193,214.96 = 57,771.53/x - Step 3: Cross multiply
128,861.75x = 193,214.96 × 57,771.53 - Step 4: Simplify right side
128,861.75x = 11,162,322,603.16 - Step 5: Solve for x
x = 11,162,322,603.16/128,861.75 - Step 6: Final answer
x = 86,622.47
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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.