Finding the Fourth Proportional to 128,400.12, 192,495.78 and 53,576.01
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Solution
The fourth proportional to 128,400.12, 192,495.78 and 53,576.01 is: 80,320.45
Step by Step Solution
- Step 1: Write the proportion equation
128,400.12 : 192,495.78 = 53,576.01 : x - Step 2: Convert to fraction form
128,400.12/192,495.78 = 53,576.01/x - Step 3: Cross multiply
128,400.12x = 192,495.78 × 53,576.01 - Step 4: Simplify right side
128,400.12x = 10,313,155,834.24 - Step 5: Solve for x
x = 10,313,155,834.24/128,400.12 - Step 6: Final answer
x = 80,320.45
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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.