Finding the Fourth Proportional to 121,854.20, 168,163.38 and 68,139.09
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Solution
The fourth proportional to 121,854.20, 168,163.38 and 68,139.09 is: 94,034.51
Step by Step Solution
- Step 1: Write the proportion equation
121,854.20 : 168,163.38 = 68,139.09 : x - Step 2: Convert to fraction form
121,854.20/168,163.38 = 68,139.09/x - Step 3: Cross multiply
121,854.20x = 168,163.38 × 68,139.09 - Step 4: Simplify right side
121,854.20x = 11,458,499,842.54 - Step 5: Solve for x
x = 11,458,499,842.54/121,854.20 - Step 6: Final answer
x = 94,034.51
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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.