Finding the Fourth Proportional to 128,415.75, 177,214.02 and 71,059.23
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Solution
The fourth proportional to 128,415.75, 177,214.02 and 71,059.23 is: 98,061.90
Step by Step Solution
- Step 1: Write the proportion equation
128,415.75 : 177,214.02 = 71,059.23 : x - Step 2: Convert to fraction form
128,415.75/177,214.02 = 71,059.23/x - Step 3: Cross multiply
128,415.75x = 177,214.02 × 71,059.23 - Step 4: Simplify right side
128,415.75x = 12,592,691,806.40 - Step 5: Solve for x
x = 12,592,691,806.40/128,415.75 - Step 6: Final answer
x = 98,061.90
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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.