Finding the Fourth Proportional to 121,930.05, 168,289.80 and 74,198.76
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Solution
The fourth proportional to 121,930.05, 168,289.80 and 74,198.76 is: 102,410.31
Step by Step Solution
- Step 1: Write the proportion equation
121,930.05 : 168,289.80 = 74,198.76 : x - Step 2: Convert to fraction form
121,930.05/168,289.80 = 74,198.76/x - Step 3: Cross multiply
121,930.05x = 168,289.80 × 74,198.76 - Step 4: Simplify right side
121,930.05x = 12,486,894,480.65 - Step 5: Solve for x
x = 12,486,894,480.65/121,930.05 - Step 6: Final answer
x = 102,410.31
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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.