Finding the Fourth Proportional to 87,305.67, 130,961.75 and 28,142.19
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Solution
The fourth proportional to 87,305.67, 130,961.75 and 28,142.19 is: 42,214.33
Step by Step Solution
- Step 1: Write the proportion equation
87,305.67 : 130,961.75 = 28,142.19 : x - Step 2: Convert to fraction form
87,305.67/130,961.75 = 28,142.19/x - Step 3: Cross multiply
87,305.67x = 130,961.75 × 28,142.19 - Step 4: Simplify right side
87,305.67x = 3,685,550,451.23 - Step 5: Solve for x
x = 3,685,550,451.23/87,305.67 - Step 6: Final answer
x = 42,214.33
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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.