Finding the Fourth Proportional to 128,108.80, 192,163.20 and 120,851.20
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Solution
The fourth proportional to 128,108.80, 192,163.20 and 120,851.20 is: 181,276.80
Step by Step Solution
- Step 1: Write the proportion equation
128,108.80 : 192,163.20 = 120,851.20 : x - Step 2: Convert to fraction form
128,108.80/192,163.20 = 120,851.20/x - Step 3: Cross multiply
128,108.80x = 192,163.20 × 120,851.20 - Step 4: Simplify right side
128,108.80x = 23,223,153,315.84 - Step 5: Solve for x
x = 23,223,153,315.84/128,108.80 - Step 6: Final answer
x = 181,276.80
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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.