Finding the Fourth Proportional to 138,390.87, 207,648.14 and 67,274.49
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Solution
The fourth proportional to 138,390.87, 207,648.14 and 67,274.49 is: 100,941.79
Step by Step Solution
- Step 1: Write the proportion equation
138,390.87 : 207,648.14 = 67,274.49 : x - Step 2: Convert to fraction form
138,390.87/207,648.14 = 67,274.49/x - Step 3: Cross multiply
138,390.87x = 207,648.14 × 67,274.49 - Step 4: Simplify right side
138,390.87x = 13,969,422,381.58 - Step 5: Solve for x
x = 13,969,422,381.58/138,390.87 - Step 6: Final answer
x = 100,941.79
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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.