Finding the Fourth Proportional to 81,815.84, 122,709.36 and 21,845.06
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Solution
The fourth proportional to 81,815.84, 122,709.36 and 21,845.06 is: 32,763.75
Step by Step Solution
- Step 1: Write the proportion equation
81,815.84 : 122,709.36 = 21,845.06 : x - Step 2: Convert to fraction form
81,815.84/122,709.36 = 21,845.06/x - Step 3: Cross multiply
81,815.84x = 122,709.36 × 21,845.06 - Step 4: Simplify right side
81,815.84x = 2,680,593,331.76 - Step 5: Solve for x
x = 2,680,593,331.76/81,815.84 - Step 6: Final answer
x = 32,763.75
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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.