Finding the Fourth Proportional to 81,381.13, 122,079.84 and 28,066.09
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Solution
The fourth proportional to 81,381.13, 122,079.84 and 28,066.09 is: 42,101.94
Step by Step Solution
- Step 1: Write the proportion equation
81,381.13 : 122,079.84 = 28,066.09 : x - Step 2: Convert to fraction form
81,381.13/122,079.84 = 28,066.09/x - Step 3: Cross multiply
81,381.13x = 122,079.84 × 28,066.09 - Step 4: Simplify right side
81,381.13x = 3,426,303,281.57 - Step 5: Solve for x
x = 3,426,303,281.57/81,381.13 - Step 6: Final answer
x = 42,101.94
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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.