Finding the Fourth Proportional to 76,689.76, 115,033.20 and 54,107.68
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Solution
The fourth proportional to 76,689.76, 115,033.20 and 54,107.68 is: 81,160.50
Step by Step Solution
- Step 1: Write the proportion equation
76,689.76 : 115,033.20 = 54,107.68 : x - Step 2: Convert to fraction form
76,689.76/115,033.20 = 54,107.68/x - Step 3: Cross multiply
76,689.76x = 115,033.20 × 54,107.68 - Step 4: Simplify right side
76,689.76x = 6,224,179,574.98 - Step 5: Solve for x
x = 6,224,179,574.98/76,689.76 - Step 6: Final answer
x = 81,160.50
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.