Finding the Fourth Proportional to 139.40, 208.83 and 96.09
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Solution
The fourth proportional to 139.40, 208.83 and 96.09 is: 143.95
Step by Step Solution
- Step 1: Write the proportion equation
139.40 : 208.83 = 96.09 : x - Step 2: Convert to fraction form
139.40/208.83 = 96.09/x - Step 3: Cross multiply
139.40x = 208.83 × 96.09 - Step 4: Simplify right side
139.40x = 20,065.51 - Step 5: Solve for x
x = 20,065.51/139.40 - Step 6: Final answer
x = 143.95
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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.