Finding the Fourth Proportional to 121,186.40, 167,009.58 and 87,135.75
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Solution
The fourth proportional to 121,186.40, 167,009.58 and 87,135.75 is: 120,083.65
Step by Step Solution
- Step 1: Write the proportion equation
121,186.40 : 167,009.58 = 87,135.75 : x - Step 2: Convert to fraction form
121,186.40/167,009.58 = 87,135.75/x - Step 3: Cross multiply
121,186.40x = 167,009.58 × 87,135.75 - Step 4: Simplify right side
121,186.40x = 14,552,505,010.49 - Step 5: Solve for x
x = 14,552,505,010.49/121,186.40 - Step 6: Final answer
x = 120,083.65
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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.