Finding the Fourth Proportional to 221,620.12, 305,790.42 and 130,930.63
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Solution
The fourth proportional to 221,620.12, 305,790.42 and 130,930.63 is: 180,657.48
Step by Step Solution
- Step 1: Write the proportion equation
221,620.12 : 305,790.42 = 130,930.63 : x - Step 2: Convert to fraction form
221,620.12/305,790.42 = 130,930.63/x - Step 3: Cross multiply
221,620.12x = 305,790.42 × 130,930.63 - Step 4: Simplify right side
221,620.12x = 40,037,332,338.56 - Step 5: Solve for x
x = 40,037,332,338.56/221,620.12 - Step 6: Final answer
x = 180,657.48
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.