Finding the Fourth Proportional to 81,415.10, 122,122.65 and 28,829.90
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Solution
The fourth proportional to 81,415.10, 122,122.65 and 28,829.90 is: 43,244.85
Step by Step Solution
- Step 1: Write the proportion equation
81,415.10 : 122,122.65 = 28,829.90 : x - Step 2: Convert to fraction form
81,415.10/122,122.65 = 28,829.90/x - Step 3: Cross multiply
81,415.10x = 122,122.65 × 28,829.90 - Step 4: Simplify right side
81,415.10x = 3,520,783,787.24 - Step 5: Solve for x
x = 3,520,783,787.24/81,415.10 - Step 6: Final answer
x = 43,244.85
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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.