Finding the Fourth Proportional to 138,986.60, 191,764.26 and 82,351.08
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Solution
The fourth proportional to 138,986.60, 191,764.26 and 82,351.08 is: 113,622.42
Step by Step Solution
- Step 1: Write the proportion equation
138,986.60 : 191,764.26 = 82,351.08 : x - Step 2: Convert to fraction form
138,986.60/191,764.26 = 82,351.08/x - Step 3: Cross multiply
138,986.60x = 191,764.26 × 82,351.08 - Step 4: Simplify right side
138,986.60x = 15,791,993,916.40 - Step 5: Solve for x
x = 15,791,993,916.40/138,986.60 - Step 6: Final answer
x = 113,622.42
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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.