Finding the Fourth Proportional to 103,754.08, 143,138.64 and 66,021.28
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Solution
The fourth proportional to 103,754.08, 143,138.64 and 66,021.28 is: 91,082.65
Step by Step Solution
- Step 1: Write the proportion equation
103,754.08 : 143,138.64 = 66,021.28 : x - Step 2: Convert to fraction form
103,754.08/143,138.64 = 66,021.28/x - Step 3: Cross multiply
103,754.08x = 143,138.64 × 66,021.28 - Step 4: Simplify right side
103,754.08x = 9,450,196,230.26 - Step 5: Solve for x
x = 9,450,196,230.26/103,754.08 - Step 6: Final answer
x = 91,082.65
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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.