Finding the Fourth Proportional to 157,811.09, 217,775.93 and 86,191.39
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Solution
The fourth proportional to 157,811.09, 217,775.93 and 86,191.39 is: 118,942.28
Step by Step Solution
- Step 1: Write the proportion equation
157,811.09 : 217,775.93 = 86,191.39 : x - Step 2: Convert to fraction form
157,811.09/217,775.93 = 86,191.39/x - Step 3: Cross multiply
157,811.09x = 217,775.93 × 86,191.39 - Step 4: Simplify right side
157,811.09x = 18,770,410,115.24 - Step 5: Solve for x
x = 18,770,410,115.24/157,811.09 - Step 6: Final answer
x = 118,942.28
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.