Finding the Fourth Proportional to 138,361.87, 190,943.22 and 84,645.91
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Solution
The fourth proportional to 138,361.87, 190,943.22 and 84,645.91 is: 116,813.70
Step by Step Solution
- Step 1: Write the proportion equation
138,361.87 : 190,943.22 = 84,645.91 : x - Step 2: Convert to fraction form
138,361.87/190,943.22 = 84,645.91/x - Step 3: Cross multiply
138,361.87x = 190,943.22 × 84,645.91 - Step 4: Simplify right side
138,361.87x = 16,162,562,615.23 - Step 5: Solve for x
x = 16,162,562,615.23/138,361.87 - Step 6: Final answer
x = 116,813.70
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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.