Finding the Fourth Proportional to 100,678.07, 138,936.26 and 55,358.97
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Solution
The fourth proportional to 100,678.07, 138,936.26 and 55,358.97 is: 76,395.66
Step by Step Solution
- Step 1: Write the proportion equation
100,678.07 : 138,936.26 = 55,358.97 : x - Step 2: Convert to fraction form
100,678.07/138,936.26 = 55,358.97/x - Step 3: Cross multiply
100,678.07x = 138,936.26 × 55,358.97 - Step 4: Simplify right side
100,678.07x = 7,691,367,866.64 - Step 5: Solve for x
x = 7,691,367,866.64/100,678.07 - Step 6: Final answer
x = 76,395.66
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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.