Finding the Fourth Proportional to 121,571.13, 167,857.06 and 78,576.08
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Solution
The fourth proportional to 121,571.13, 167,857.06 and 78,576.08 is: 108,492.45
Step by Step Solution
- Step 1: Write the proportion equation
121,571.13 : 167,857.06 = 78,576.08 : x - Step 2: Convert to fraction form
121,571.13/167,857.06 = 78,576.08/x - Step 3: Cross multiply
121,571.13x = 167,857.06 × 78,576.08 - Step 4: Simplify right side
121,571.13x = 13,189,549,775.12 - Step 5: Solve for x
x = 13,189,549,775.12/121,571.13 - Step 6: Final answer
x = 108,492.45
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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.