Finding the Fourth Proportional to 138,319.68, 190,479.33 and 120,162.09
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Solution
The fourth proportional to 138,319.68, 190,479.33 and 120,162.09 is: 165,474.60
Step by Step Solution
- Step 1: Write the proportion equation
138,319.68 : 190,479.33 = 120,162.09 : x - Step 2: Convert to fraction form
138,319.68/190,479.33 = 120,162.09/x - Step 3: Cross multiply
138,319.68x = 190,479.33 × 120,162.09 - Step 4: Simplify right side
138,319.68x = 22,888,394,394.60 - Step 5: Solve for x
x = 22,888,394,394.60/138,319.68 - Step 6: Final answer
x = 165,474.60
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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.