Finding the Fourth Proportional to 143,478.09, 215,208.81 and 54,740.55
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Solution
The fourth proportional to 143,478.09, 215,208.81 and 54,740.55 is: 82,107.65
Step by Step Solution
- Step 1: Write the proportion equation
143,478.09 : 215,208.81 = 54,740.55 : x - Step 2: Convert to fraction form
143,478.09/215,208.81 = 54,740.55/x - Step 3: Cross multiply
143,478.09x = 215,208.81 × 54,740.55 - Step 4: Simplify right side
143,478.09x = 11,780,648,624.25 - Step 5: Solve for x
x = 11,780,648,624.25/143,478.09 - Step 6: Final answer
x = 82,107.65
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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.