Finding the Fourth Proportional to 100,619.11, 138,851.57 and 55,297.08
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Solution
The fourth proportional to 100,619.11, 138,851.57 and 55,297.08 is: 76,308.43
Step by Step Solution
- Step 1: Write the proportion equation
100,619.11 : 138,851.57 = 55,297.08 : x - Step 2: Convert to fraction form
100,619.11/138,851.57 = 55,297.08/x - Step 3: Cross multiply
100,619.11x = 138,851.57 × 55,297.08 - Step 4: Simplify right side
100,619.11x = 7,678,086,201.61 - Step 5: Solve for x
x = 7,678,086,201.61/100,619.11 - Step 6: Final answer
x = 76,308.43
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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.