Finding the Fourth Proportional to 128,768.16, 193,114.80 and 49,864.80
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Solution
The fourth proportional to 128,768.16, 193,114.80 and 49,864.80 is: 74,782.70
Step by Step Solution
- Step 1: Write the proportion equation
128,768.16 : 193,114.80 = 49,864.80 : x - Step 2: Convert to fraction form
128,768.16/193,114.80 = 49,864.80/x - Step 3: Cross multiply
128,768.16x = 193,114.80 × 49,864.80 - Step 4: Simplify right side
128,768.16x = 9,629,630,879.04 - Step 5: Solve for x
x = 9,629,630,879.04/128,768.16 - Step 6: Final answer
x = 74,782.70
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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.