Finding the Fourth Proportional to 128,460,161.44, 177,141,021.84 and 76,239,107.92
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Solution
The fourth proportional to 128,460,161.44, 177,141,021.84 and 76,239,107.92 is: 105,130,441.45
Step by Step Solution
- Step 1: Write the proportion equation
128,460,161.44 : 177,141,021.84 = 76,239,107.92 : x - Step 2: Convert to fraction form
128,460,161.44/177,141,021.84 = 76,239,107.92/x - Step 3: Cross multiply
128,460,161.44x = 177,141,021.84 × 76,239,107.92 - Step 4: Simplify right side
128,460,161.44x = 13,505,073,481,118,838 - Step 5: Solve for x
x = 13,505,073,481,118,838/128,460,161.44 - Step 6: Final answer
x = 105,130,441.45
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.