Finding the Fourth Proportional to 128,285.36, 192,418.92 and 39,529.64
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Solution
The fourth proportional to 128,285.36, 192,418.92 and 39,529.64 is: 59,291.65
Step by Step Solution
- Step 1: Write the proportion equation
128,285.36 : 192,418.92 = 39,529.64 : x - Step 2: Convert to fraction form
128,285.36/192,418.92 = 39,529.64/x - Step 3: Cross multiply
128,285.36x = 192,418.92 × 39,529.64 - Step 4: Simplify right side
128,285.36x = 7,606,250,636.79 - Step 5: Solve for x
x = 7,606,250,636.79/128,285.36 - Step 6: Final answer
x = 59,291.65
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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.