Finding the Fourth Proportional to 99,819.20, 149,728.80 and 71,679.80
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Solution
The fourth proportional to 99,819.20, 149,728.80 and 71,679.80 is: 107,519.70
Step by Step Solution
- Step 1: Write the proportion equation
99,819.20 : 149,728.80 = 71,679.80 : x - Step 2: Convert to fraction form
99,819.20/149,728.80 = 71,679.80/x - Step 3: Cross multiply
99,819.20x = 149,728.80 × 71,679.80 - Step 4: Simplify right side
99,819.20x = 10,732,530,438.24 - Step 5: Solve for x
x = 10,732,530,438.24/99,819.20 - Step 6: Final answer
x = 107,519.70
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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.