Finding the Fourth Proportional to 121,997.72, 168,357.68 and 68,287.68
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Solution
The fourth proportional to 121,997.72, 168,357.68 and 68,287.68 is: 94,237.46
Step by Step Solution
- Step 1: Write the proportion equation
121,997.72 : 168,357.68 = 68,287.68 : x - Step 2: Convert to fraction form
121,997.72/168,357.68 = 68,287.68/x - Step 3: Cross multiply
121,997.72x = 168,357.68 × 68,287.68 - Step 4: Simplify right side
121,997.72x = 11,496,755,377.38 - Step 5: Solve for x
x = 11,496,755,377.38/121,997.72 - Step 6: Final answer
x = 94,237.46
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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.