Finding the Fourth Proportional to 121,981.75, 168,342.23 and 68,265.65
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Solution
The fourth proportional to 121,981.75, 168,342.23 and 68,265.65 is: 94,210.75
Step by Step Solution
- Step 1: Write the proportion equation
121,981.75 : 168,342.23 = 68,265.65 : x - Step 2: Convert to fraction form
121,981.75/168,342.23 = 68,265.65/x - Step 3: Cross multiply
121,981.75x = 168,342.23 × 68,265.65 - Step 4: Simplify right side
121,981.75x = 11,491,991,753.40 - Step 5: Solve for x
x = 11,491,991,753.40/121,981.75 - Step 6: Final answer
x = 94,210.75
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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.