Finding the Fourth Proportional to 121,798.11, 167,997.99 and 79,414.05
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Solution
The fourth proportional to 121,798.11, 167,997.99 and 79,414.05 is: 109,537.01
Step by Step Solution
- Step 1: Write the proportion equation
121,798.11 : 167,997.99 = 79,414.05 : x - Step 2: Convert to fraction form
121,798.11/167,997.99 = 79,414.05/x - Step 3: Cross multiply
121,798.11x = 167,997.99 × 79,414.05 - Step 4: Simplify right side
121,798.11x = 13,341,399,937.77 - Step 5: Solve for x
x = 13,341,399,937.77/121,798.11 - Step 6: Final answer
x = 109,537.01
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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.