Finding the Fourth Proportional to 128,539.30, 192,722.55 and 68,577.70
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Solution
The fourth proportional to 128,539.30, 192,722.55 and 68,577.70 is: 102,820.45
Step by Step Solution
- Step 1: Write the proportion equation
128,539.30 : 192,722.55 = 68,577.70 : x - Step 2: Convert to fraction form
128,539.30/192,722.55 = 68,577.70/x - Step 3: Cross multiply
128,539.30x = 192,722.55 × 68,577.70 - Step 4: Simplify right side
128,539.30x = 13,216,469,217.14 - Step 5: Solve for x
x = 13,216,469,217.14/128,539.30 - Step 6: Final answer
x = 102,820.45
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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.