Finding the Fourth Proportional to 103,821.10, 155,403.60 and 81,513.70
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Solution
The fourth proportional to 103,821.10, 155,403.60 and 81,513.70 is: 122,012.99
Step by Step Solution
- Step 1: Write the proportion equation
103,821.10 : 155,403.60 = 81,513.70 : x - Step 2: Convert to fraction form
103,821.10/155,403.60 = 81,513.70/x - Step 3: Cross multiply
103,821.10x = 155,403.60 × 81,513.70 - Step 4: Simplify right side
103,821.10x = 12,667,522,429.32 - Step 5: Solve for x
x = 12,667,522,429.32/103,821.10 - Step 6: Final answer
x = 122,012.99
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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.