Finding the Fourth Proportional to 128,794.20, 193,709.70 and 115,315.80
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Solution
The fourth proportional to 128,794.20, 193,709.70 and 115,315.80 is: 173,437.85
Step by Step Solution
- Step 1: Write the proportion equation
128,794.20 : 193,709.70 = 115,315.80 : x - Step 2: Convert to fraction form
128,794.20/193,709.70 = 115,315.80/x - Step 3: Cross multiply
128,794.20x = 193,709.70 × 115,315.80 - Step 4: Simplify right side
128,794.20x = 22,337,789,023.26 - Step 5: Solve for x
x = 22,337,789,023.26/128,794.20 - Step 6: Final answer
x = 173,437.85
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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.