Finding the Fourth Proportional to 128,294.80, 192,442.20 and 121,037.20
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Solution
The fourth proportional to 128,294.80, 192,442.20 and 121,037.20 is: 181,555.80
Step by Step Solution
- Step 1: Write the proportion equation
128,294.80 : 192,442.20 = 121,037.20 : x - Step 2: Convert to fraction form
128,294.80/192,442.20 = 121,037.20/x - Step 3: Cross multiply
128,294.80x = 192,442.20 × 121,037.20 - Step 4: Simplify right side
128,294.80x = 23,292,665,049.84 - Step 5: Solve for x
x = 23,292,665,049.84/128,294.80 - Step 6: Final answer
x = 181,555.80
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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.