Finding the Third Proportional to 66,930 and 139,405
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Solution
The third proportional to 66,930 and 139,405 is: 290,359.39
Step by Step Solution
- Step 1: Write the proportion equation
66,930 : 139,405 = 139,405 : x - Step 2: Convert to fraction form
66,930/139,405 = 139,405/x - Step 3: Cross multiply
66,930x = 139,405 × 139,405 - Step 4: Simplify right side
66,930x = 19,433,754,025 - Step 5: Solve for x
x = 19,433,754,025/66,930 - Step 6: Final answer
x = 290,359.39
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These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.