Finding the Fourth Proportional to 128,260.26, 176,979.33 and 71,660.70
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Solution
The fourth proportional to 128,260.26, 176,979.33 and 71,660.70 is: 98,880.69
Step by Step Solution
- Step 1: Write the proportion equation
128,260.26 : 176,979.33 = 71,660.70 : x - Step 2: Convert to fraction form
128,260.26/176,979.33 = 71,660.70/x - Step 3: Cross multiply
128,260.26x = 176,979.33 × 71,660.70 - Step 4: Simplify right side
128,260.26x = 12,682,462,673.33 - Step 5: Solve for x
x = 12,682,462,673.33/128,260.26 - Step 6: Final answer
x = 98,880.69
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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.