Finding the Fourth Proportional to 121,911.48, 168,234.74 and 68,198.76
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Solution
The fourth proportional to 121,911.48, 168,234.74 and 68,198.76 is: 94,112.55
Step by Step Solution
- Step 1: Write the proportion equation
121,911.48 : 168,234.74 = 68,198.76 : x - Step 2: Convert to fraction form
121,911.48/168,234.74 = 68,198.76/x - Step 3: Cross multiply
121,911.48x = 168,234.74 × 68,198.76 - Step 4: Simplify right side
121,911.48x = 11,473,400,656.92 - Step 5: Solve for x
x = 11,473,400,656.92/121,911.48 - Step 6: Final answer
x = 94,112.55
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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.