Finding the Fourth Proportional to 138,120.74, 207,181.12 and 91,362.68
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Solution
The fourth proportional to 138,120.74, 207,181.12 and 91,362.68 is: 137,044.03
Step by Step Solution
- Step 1: Write the proportion equation
138,120.74 : 207,181.12 = 91,362.68 : x - Step 2: Convert to fraction form
138,120.74/207,181.12 = 91,362.68/x - Step 3: Cross multiply
138,120.74x = 207,181.12 × 91,362.68 - Step 4: Simplify right side
138,120.74x = 18,928,622,658.15 - Step 5: Solve for x
x = 18,928,622,658.15/138,120.74 - Step 6: Final answer
x = 137,044.03
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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.