Finding the Fourth Proportional to 128,130.30, 192,195.45 and 120,872.70
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Solution
The fourth proportional to 128,130.30, 192,195.45 and 120,872.70 is: 181,309.05
Step by Step Solution
- Step 1: Write the proportion equation
128,130.30 : 192,195.45 = 120,872.70 : x - Step 2: Convert to fraction form
128,130.30/192,195.45 = 120,872.70/x - Step 3: Cross multiply
128,130.30x = 192,195.45 × 120,872.70 - Step 4: Simplify right side
128,130.30x = 23,231,182,969.22 - Step 5: Solve for x
x = 23,231,182,969.22/128,130.30 - Step 6: Final answer
x = 181,309.05
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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.