Finding the Fourth Proportional to 128,213.96, 192,339.14 and 39,474.84
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Solution
The fourth proportional to 128,213.96, 192,339.14 and 39,474.84 is: 59,217.86
Step by Step Solution
- Step 1: Write the proportion equation
128,213.96 : 192,339.14 = 39,474.84 : x - Step 2: Convert to fraction form
128,213.96/192,339.14 = 39,474.84/x - Step 3: Cross multiply
128,213.96x = 192,339.14 × 39,474.84 - Step 4: Simplify right side
128,213.96x = 7,592,556,777.24 - Step 5: Solve for x
x = 7,592,556,777.24/128,213.96 - Step 6: Final answer
x = 59,217.86
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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.