Finding the Fourth Proportional to 128,930.75, 193,400.99 and 40,183.91
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Solution
The fourth proportional to 128,930.75, 193,400.99 and 40,183.91 is: 60,277.38
Step by Step Solution
- Step 1: Write the proportion equation
128,930.75 : 193,400.99 = 40,183.91 : x - Step 2: Convert to fraction form
128,930.75/193,400.99 = 40,183.91/x - Step 3: Cross multiply
128,930.75x = 193,400.99 × 40,183.91 - Step 4: Simplify right side
128,930.75x = 7,771,607,976.07 - Step 5: Solve for x
x = 7,771,607,976.07/128,930.75 - Step 6: Final answer
x = 60,277.38
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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.