Finding the Fourth Proportional to 128,745.09, 193,170.96 and 69,511.14
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Solution
The fourth proportional to 128,745.09, 193,170.96 and 69,511.14 is: 104,295.50
Step by Step Solution
- Step 1: Write the proportion equation
128,745.09 : 193,170.96 = 69,511.14 : x - Step 2: Convert to fraction form
128,745.09/193,170.96 = 69,511.14/x - Step 3: Cross multiply
128,745.09x = 193,170.96 × 69,511.14 - Step 4: Simplify right side
128,745.09x = 13,427,533,644.49 - Step 5: Solve for x
x = 13,427,533,644.49/128,745.09 - Step 6: Final answer
x = 104,295.50
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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.