Finding the Fourth Proportional to 81,408.80, 122,134.80 and 28,812.80
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Solution
The fourth proportional to 81,408.80, 122,134.80 and 28,812.80 is: 43,226.84
Step by Step Solution
- Step 1: Write the proportion equation
81,408.80 : 122,134.80 = 28,812.80 : x - Step 2: Convert to fraction form
81,408.80/122,134.80 = 28,812.80/x - Step 3: Cross multiply
81,408.80x = 122,134.80 × 28,812.80 - Step 4: Simplify right side
81,408.80x = 3,519,045,565.44 - Step 5: Solve for x
x = 3,519,045,565.44/81,408.80 - Step 6: Final answer
x = 43,226.84
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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.