Finding the Fourth Proportional to 138,639.58, 207,937.68 and 45,144.70
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Solution
The fourth proportional to 138,639.58, 207,937.68 and 45,144.70 is: 67,709.99
Step by Step Solution
- Step 1: Write the proportion equation
138,639.58 : 207,937.68 = 45,144.70 : x - Step 2: Convert to fraction form
138,639.58/207,937.68 = 45,144.70/x - Step 3: Cross multiply
138,639.58x = 207,937.68 × 45,144.70 - Step 4: Simplify right side
138,639.58x = 9,387,284,182.30 - Step 5: Solve for x
x = 9,387,284,182.30/138,639.58 - Step 6: Final answer
x = 67,709.99
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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.