Finding the Fourth Proportional to 74,759.80, 112,139.70 and 66,449.20
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Solution
The fourth proportional to 74,759.80, 112,139.70 and 66,449.20 is: 99,673.80
Step by Step Solution
- Step 1: Write the proportion equation
74,759.80 : 112,139.70 = 66,449.20 : x - Step 2: Convert to fraction form
74,759.80/112,139.70 = 66,449.20/x - Step 3: Cross multiply
74,759.80x = 112,139.70 × 66,449.20 - Step 4: Simplify right side
74,759.80x = 7,451,593,353.24 - Step 5: Solve for x
x = 7,451,593,353.24/74,759.80 - Step 6: Final answer
x = 99,673.80
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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.