Finding the Fourth Proportional to 217,128.09, 299,649.07 and 121,665.54
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Solution
The fourth proportional to 217,128.09, 299,649.07 and 121,665.54 is: 167,905.34
Step by Step Solution
- Step 1: Write the proportion equation
217,128.09 : 299,649.07 = 121,665.54 : x - Step 2: Convert to fraction form
217,128.09/299,649.07 = 121,665.54/x - Step 3: Cross multiply
217,128.09x = 299,649.07 × 121,665.54 - Step 4: Simplify right side
217,128.09x = 36,456,967,187.81 - Step 5: Solve for x
x = 36,456,967,187.81/217,128.09 - Step 6: Final answer
x = 167,905.34
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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.