Finding the Fourth Proportional to 138,363.21, 190,955.58 and 84,683.97
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Solution
The fourth proportional to 138,363.21, 190,955.58 and 84,683.97 is: 116,872.66
Step by Step Solution
- Step 1: Write the proportion equation
138,363.21 : 190,955.58 = 84,683.97 : x - Step 2: Convert to fraction form
138,363.21/190,955.58 = 84,683.97/x - Step 3: Cross multiply
138,363.21x = 190,955.58 × 84,683.97 - Step 4: Simplify right side
138,363.21x = 16,170,875,229.85 - Step 5: Solve for x
x = 16,170,875,229.85/138,363.21 - Step 6: Final answer
x = 116,872.66
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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.