Finding the Fourth Proportional to 128,481.14, 177,299.44 and 71,120.59
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Solution
The fourth proportional to 128,481.14, 177,299.44 and 71,120.59 is: 98,143.90
Step by Step Solution
- Step 1: Write the proportion equation
128,481.14 : 177,299.44 = 71,120.59 : x - Step 2: Convert to fraction form
128,481.14/177,299.44 = 71,120.59/x - Step 3: Cross multiply
128,481.14x = 177,299.44 × 71,120.59 - Step 4: Simplify right side
128,481.14x = 12,609,640,158.42 - Step 5: Solve for x
x = 12,609,640,158.42/128,481.14 - Step 6: Final answer
x = 98,143.90
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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.