Finding the Fourth Proportional to 137.97, 207.21 and 69.63
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Solution
The fourth proportional to 137.97, 207.21 and 69.63 is: 104.57
Step by Step Solution
- Step 1: Write the proportion equation
137.97 : 207.21 = 69.63 : x - Step 2: Convert to fraction form
137.97/207.21 = 69.63/x - Step 3: Cross multiply
137.97x = 207.21 × 69.63 - Step 4: Simplify right side
137.97x = 14,428.03 - Step 5: Solve for x
x = 14,428.03/137.97 - Step 6: Final answer
x = 104.57
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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.