Finding the Fourth Proportional to 138,922.20, 207,789.84 and 115,986.60
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Solution
The fourth proportional to 138,922.20, 207,789.84 and 115,986.60 is: 173,484.42
Step by Step Solution
- Step 1: Write the proportion equation
138,922.20 : 207,789.84 = 115,986.60 : x - Step 2: Convert to fraction form
138,922.20/207,789.84 = 115,986.60/x - Step 3: Cross multiply
138,922.20x = 207,789.84 × 115,986.60 - Step 4: Simplify right side
138,922.20x = 24,100,837,056.14 - Step 5: Solve for x
x = 24,100,837,056.14/138,922.20 - Step 6: Final answer
x = 173,484.42
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.