Finding the Fourth Proportional to 128,400.14, 192,641.21 and 61,846.99
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Solution
The fourth proportional to 128,400.14, 192,641.21 and 61,846.99 is: 92,790.24
Step by Step Solution
- Step 1: Write the proportion equation
128,400.14 : 192,641.21 = 61,846.99 : x - Step 2: Convert to fraction form
128,400.14/192,641.21 = 61,846.99/x - Step 3: Cross multiply
128,400.14x = 192,641.21 × 61,846.99 - Step 4: Simplify right side
128,400.14x = 11,914,279,687.10 - Step 5: Solve for x
x = 11,914,279,687.10/128,400.14 - Step 6: Final answer
x = 92,790.24
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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.