Finding the Fourth Proportional to 128,365.30, 192,487.20 and 75,072.70
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Solution
The fourth proportional to 128,365.30, 192,487.20 and 75,072.70 is: 112,573.52
Step by Step Solution
- Step 1: Write the proportion equation
128,365.30 : 192,487.20 = 75,072.70 : x - Step 2: Convert to fraction form
128,365.30/192,487.20 = 75,072.70/x - Step 3: Cross multiply
128,365.30x = 192,487.20 × 75,072.70 - Step 4: Simplify right side
128,365.30x = 14,450,533,819.44 - Step 5: Solve for x
x = 14,450,533,819.44/128,365.30 - Step 6: Final answer
x = 112,573.52
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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.