Finding the Fourth Proportional to 128,311.10, 192,102.15 and 121,328.90
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Solution
The fourth proportional to 128,311.10, 192,102.15 and 121,328.90 is: 181,648.68
Step by Step Solution
- Step 1: Write the proportion equation
128,311.10 : 192,102.15 = 121,328.90 : x - Step 2: Convert to fraction form
128,311.10/192,102.15 = 121,328.90/x - Step 3: Cross multiply
128,311.10x = 192,102.15 × 121,328.90 - Step 4: Simplify right side
128,311.10x = 23,307,542,547.14 - Step 5: Solve for x
x = 23,307,542,547.14/128,311.10 - Step 6: Final answer
x = 181,648.68
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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.