Finding the Fourth Proportional to 203,438.75, 305,158.17 and 78,779.75
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Solution
The fourth proportional to 203,438.75, 305,158.17 and 78,779.75 is: 118,169.64
Step by Step Solution
- Step 1: Write the proportion equation
203,438.75 : 305,158.17 = 78,779.75 : x - Step 2: Convert to fraction form
203,438.75/305,158.17 = 78,779.75/x - Step 3: Cross multiply
203,438.75x = 305,158.17 × 78,779.75 - Step 4: Simplify right side
203,438.75x = 24,040,284,343.06 - Step 5: Solve for x
x = 24,040,284,343.06/203,438.75 - Step 6: Final answer
x = 118,169.64
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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.