Finding the Fourth Proportional to 138,357.28, 190,946.62 and 80,993.14
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Solution
The fourth proportional to 138,357.28, 190,946.62 and 80,993.14 is: 111,778.48
Step by Step Solution
- Step 1: Write the proportion equation
138,357.28 : 190,946.62 = 80,993.14 : x - Step 2: Convert to fraction form
138,357.28/190,946.62 = 80,993.14/x - Step 3: Cross multiply
138,357.28x = 190,946.62 × 80,993.14 - Step 4: Simplify right side
138,357.28x = 15,465,366,326.19 - Step 5: Solve for x
x = 15,465,366,326.19/138,357.28 - Step 6: Final answer
x = 111,778.48
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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.