Finding the Fourth Proportional to 71,680.70, 107,484.60 and 42,107.60
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Solution
The fourth proportional to 71,680.70, 107,484.60 and 42,107.60 is: 63,139.99
Step by Step Solution
- Step 1: Write the proportion equation
71,680.70 : 107,484.60 = 42,107.60 : x - Step 2: Convert to fraction form
71,680.70/107,484.60 = 42,107.60/x - Step 3: Cross multiply
71,680.70x = 107,484.60 × 42,107.60 - Step 4: Simplify right side
71,680.70x = 4,525,918,542.96 - Step 5: Solve for x
x = 4,525,918,542.96/71,680.70 - Step 6: Final answer
x = 63,139.99
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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.