Finding the Fourth Proportional to 128,289.11, 192,433.65 and 57,193.38
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Solution
The fourth proportional to 128,289.11, 192,433.65 and 57,193.38 is: 85,790.07
Step by Step Solution
- Step 1: Write the proportion equation
128,289.11 : 192,433.65 = 57,193.38 : x - Step 2: Convert to fraction form
128,289.11/192,433.65 = 57,193.38/x - Step 3: Cross multiply
128,289.11x = 192,433.65 × 57,193.38 - Step 4: Simplify right side
128,289.11x = 11,005,930,869.24 - Step 5: Solve for x
x = 11,005,930,869.24/128,289.11 - Step 6: Final answer
x = 85,790.07
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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.