Finding the Fourth Proportional to 103,638.02, 143,034.26 and 76,856.99
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Solution
The fourth proportional to 103,638.02, 143,034.26 and 76,856.99 is: 106,072.87
Step by Step Solution
- Step 1: Write the proportion equation
103,638.02 : 143,034.26 = 76,856.99 : x - Step 2: Convert to fraction form
103,638.02/143,034.26 = 76,856.99/x - Step 3: Cross multiply
103,638.02x = 143,034.26 × 76,856.99 - Step 4: Simplify right side
103,638.02x = 10,993,181,591.02 - Step 5: Solve for x
x = 10,993,181,591.02/103,638.02 - Step 6: Final answer
x = 106,072.87
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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.