Finding the Fourth Proportional to 157,781.28, 217,736.73 and 86,161.08
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Solution
The fourth proportional to 157,781.28, 217,736.73 and 86,161.08 is: 118,901.51
Step by Step Solution
- Step 1: Write the proportion equation
157,781.28 : 217,736.73 = 86,161.08 : x - Step 2: Convert to fraction form
157,781.28/217,736.73 = 86,161.08/x - Step 3: Cross multiply
157,781.28x = 217,736.73 × 86,161.08 - Step 4: Simplify right side
157,781.28x = 18,760,431,812.47 - Step 5: Solve for x
x = 18,760,431,812.47/157,781.28 - Step 6: Final answer
x = 118,901.51
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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.