Finding the Fourth Proportional to 128,525.67, 177,344.34 and 80,745.19
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Solution
The fourth proportional to 128,525.67, 177,344.34 and 80,745.19 is: 111,415.11
Step by Step Solution
- Step 1: Write the proportion equation
128,525.67 : 177,344.34 = 80,745.19 : x - Step 2: Convert to fraction form
128,525.67/177,344.34 = 80,745.19/x - Step 3: Cross multiply
128,525.67x = 177,344.34 × 80,745.19 - Step 4: Simplify right side
128,525.67x = 14,319,701,682.57 - Step 5: Solve for x
x = 14,319,701,682.57/128,525.67 - Step 6: Final answer
x = 111,415.11
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1.5x scale
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.