Finding the Fourth Proportional to 128,216.20, 192,324.30 and 115,385.80
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Solution
The fourth proportional to 128,216.20, 192,324.30 and 115,385.80 is: 173,078.70
Step by Step Solution
- Step 1: Write the proportion equation
128,216.20 : 192,324.30 = 115,385.80 : x - Step 2: Convert to fraction form
128,216.20/192,324.30 = 115,385.80/x - Step 3: Cross multiply
128,216.20x = 192,324.30 × 115,385.80 - Step 4: Simplify right side
128,216.20x = 22,191,493,214.94 - Step 5: Solve for x
x = 22,191,493,214.94/128,216.20 - Step 6: Final answer
x = 173,078.70
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1.5x scale
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.