Finding the Fourth Proportional to 138,998.12, 191,812.74 and 82,375.88
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Solution
The fourth proportional to 138,998.12, 191,812.74 and 82,375.88 is: 113,675.95
Step by Step Solution
- Step 1: Write the proportion equation
138,998.12 : 191,812.74 = 82,375.88 : x - Step 2: Convert to fraction form
138,998.12/191,812.74 = 82,375.88/x - Step 3: Cross multiply
138,998.12x = 191,812.74 × 82,375.88 - Step 4: Simplify right side
138,998.12x = 15,800,743,252.71 - Step 5: Solve for x
x = 15,800,743,252.71/138,998.12 - Step 6: Final answer
x = 113,675.95
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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.