Finding the Fourth Proportional to 138,120.21, 207,224.10 and 49,371.75
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Solution
The fourth proportional to 138,120.21, 207,224.10 and 49,371.75 is: 74,073.28
Step by Step Solution
- Step 1: Write the proportion equation
138,120.21 : 207,224.10 = 49,371.75 : x - Step 2: Convert to fraction form
138,120.21/207,224.10 = 49,371.75/x - Step 3: Cross multiply
138,120.21x = 207,224.10 × 49,371.75 - Step 4: Simplify right side
138,120.21x = 10,231,016,459.18 - Step 5: Solve for x
x = 10,231,016,459.18/138,120.21 - Step 6: Final answer
x = 74,073.28
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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.