Finding the Fourth Proportional to 138,198.64, 207,209.28 and 66,121.84
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Solution
The fourth proportional to 138,198.64, 207,209.28 and 66,121.84 is: 99,140.33
Step by Step Solution
- Step 1: Write the proportion equation
138,198.64 : 207,209.28 = 66,121.84 : x - Step 2: Convert to fraction form
138,198.64/207,209.28 = 66,121.84/x - Step 3: Cross multiply
138,198.64x = 207,209.28 × 66,121.84 - Step 4: Simplify right side
138,198.64x = 13,701,058,858.68 - Step 5: Solve for x
x = 13,701,058,858.68/138,198.64 - Step 6: Final answer
x = 99,140.33
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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.