Finding the Fourth Proportional to 121,879.79, 168,209.97 and 68,175.95
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Solution
The fourth proportional to 121,879.79, 168,209.97 and 68,175.95 is: 94,091.67
Step by Step Solution
- Step 1: Write the proportion equation
121,879.79 : 168,209.97 = 68,175.95 : x - Step 2: Convert to fraction form
121,879.79/168,209.97 = 68,175.95/x - Step 3: Cross multiply
121,879.79x = 168,209.97 × 68,175.95 - Step 4: Simplify right side
121,879.79x = 11,467,873,407.51 - Step 5: Solve for x
x = 11,467,873,407.51/121,879.79 - Step 6: Final answer
x = 94,091.67
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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.