Finding the Fourth Proportional to 128,409.35, 192,649.47 and 53,564.68
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Solution
The fourth proportional to 128,409.35, 192,649.47 and 53,564.68 is: 80,361.80
Step by Step Solution
- Step 1: Write the proportion equation
128,409.35 : 192,649.47 = 53,564.68 : x - Step 2: Convert to fraction form
128,409.35/192,649.47 = 53,564.68/x - Step 3: Cross multiply
128,409.35x = 192,649.47 × 53,564.68 - Step 4: Simplify right side
128,409.35x = 10,319,205,981.65 - Step 5: Solve for x
x = 10,319,205,981.65/128,409.35 - Step 6: Final answer
x = 80,361.80
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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.