Finding the Fourth Proportional to 121,879.49, 168,238.93 and 91,752.20
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Solution
The fourth proportional to 121,879.49, 168,238.93 and 91,752.20 is: 126,652.09
Step by Step Solution
- Step 1: Write the proportion equation
121,879.49 : 168,238.93 = 91,752.20 : x - Step 2: Convert to fraction form
121,879.49/168,238.93 = 91,752.20/x - Step 3: Cross multiply
121,879.49x = 168,238.93 × 91,752.20 - Step 4: Simplify right side
121,879.49x = 15,436,292,144.36 - Step 5: Solve for x
x = 15,436,292,144.36/121,879.49 - Step 6: Final answer
x = 126,652.09
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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.