Finding the Fourth Proportional to 138,575.76, 207,708.12 and 68,504.28
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Solution
The fourth proportional to 138,575.76, 207,708.12 and 68,504.28 is: 102,679.54
Step by Step Solution
- Step 1: Write the proportion equation
138,575.76 : 207,708.12 = 68,504.28 : x - Step 2: Convert to fraction form
138,575.76/207,708.12 = 68,504.28/x - Step 3: Cross multiply
138,575.76x = 207,708.12 × 68,504.28 - Step 4: Simplify right side
138,575.76x = 14,228,895,210.75 - Step 5: Solve for x
x = 14,228,895,210.75/138,575.76 - Step 6: Final answer
x = 102,679.54
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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.