Finding the Fourth Proportional to 138,682.20, 207,731.70 and 115,354.20
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Solution
The fourth proportional to 138,682.20, 207,731.70 and 115,354.20 is: 172,788.75
Step by Step Solution
- Step 1: Write the proportion equation
138,682.20 : 207,731.70 = 115,354.20 : x - Step 2: Convert to fraction form
138,682.20/207,731.70 = 115,354.20/x - Step 3: Cross multiply
138,682.20x = 207,731.70 × 115,354.20 - Step 4: Simplify right side
138,682.20x = 23,962,724,068.14 - Step 5: Solve for x
x = 23,962,724,068.14/138,682.20 - Step 6: Final answer
x = 172,788.75
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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.