Finding the Fourth Proportional to 121,816.33, 168,105.76 and 68,101.09
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Solution
The fourth proportional to 121,816.33, 168,105.76 and 68,101.09 is: 93,979.07
Step by Step Solution
- Step 1: Write the proportion equation
121,816.33 : 168,105.76 = 68,101.09 : x - Step 2: Convert to fraction form
121,816.33/168,105.76 = 68,101.09/x - Step 3: Cross multiply
121,816.33x = 168,105.76 × 68,101.09 - Step 4: Simplify right side
121,816.33x = 11,448,185,491.28 - Step 5: Solve for x
x = 11,448,185,491.28/121,816.33 - Step 6: Final answer
x = 93,979.07
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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.