Finding the Fourth Proportional to 81,989.21, 113,149.97 and 50,164.26
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Solution
The fourth proportional to 81,989.21, 113,149.97 and 50,164.26 is: 69,229.65
Step by Step Solution
- Step 1: Write the proportion equation
81,989.21 : 113,149.97 = 50,164.26 : x - Step 2: Convert to fraction form
81,989.21/113,149.97 = 50,164.26/x - Step 3: Cross multiply
81,989.21x = 113,149.97 × 50,164.26 - Step 4: Simplify right side
81,989.21x = 5,676,084,263.25 - Step 5: Solve for x
x = 5,676,084,263.25/81,989.21 - Step 6: Final answer
x = 69,229.65
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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.