Finding the Fourth Proportional to 81,781.07, 122,671.60 and 21,809.75
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Solution
The fourth proportional to 81,781.07, 122,671.60 and 21,809.75 is: 32,714.62
Step by Step Solution
- Step 1: Write the proportion equation
81,781.07 : 122,671.60 = 21,809.75 : x - Step 2: Convert to fraction form
81,781.07/122,671.60 = 21,809.75/x - Step 3: Cross multiply
81,781.07x = 122,671.60 × 21,809.75 - Step 4: Simplify right side
81,781.07x = 2,675,436,928.10 - Step 5: Solve for x
x = 2,675,436,928.10/81,781.07 - Step 6: Final answer
x = 32,714.62
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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.