Finding the Fourth Proportional to 121,917.78, 168,249.90 and 68,212.08
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Solution
The fourth proportional to 121,917.78, 168,249.90 and 68,212.08 is: 94,134.55
Step by Step Solution
- Step 1: Write the proportion equation
121,917.78 : 168,249.90 = 68,212.08 : x - Step 2: Convert to fraction form
121,917.78/168,249.90 = 68,212.08/x - Step 3: Cross multiply
121,917.78x = 168,249.90 × 68,212.08 - Step 4: Simplify right side
121,917.78x = 11,476,675,638.79 - Step 5: Solve for x
x = 11,476,675,638.79/121,917.78 - Step 6: Final answer
x = 94,134.55
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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.