Finding the Fourth Proportional to 128,136.30, 192,204.45 and 53,231.55
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Solution
The fourth proportional to 128,136.30, 192,204.45 and 53,231.55 is: 79,847.33
Step by Step Solution
- Step 1: Write the proportion equation
128,136.30 : 192,204.45 = 53,231.55 : x - Step 2: Convert to fraction form
128,136.30/192,204.45 = 53,231.55/x - Step 3: Cross multiply
128,136.30x = 192,204.45 × 53,231.55 - Step 4: Simplify right side
128,136.30x = 10,231,340,790.40 - Step 5: Solve for x
x = 10,231,340,790.40/128,136.30 - Step 6: Final answer
x = 79,847.33
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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.