Finding the Fourth Proportional to 143,433.73, 197,943.36 and 78,905.68
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Solution
The fourth proportional to 143,433.73, 197,943.36 and 78,905.68 is: 108,892.49
Step by Step Solution
- Step 1: Write the proportion equation
143,433.73 : 197,943.36 = 78,905.68 : x - Step 2: Convert to fraction form
143,433.73/197,943.36 = 78,905.68/x - Step 3: Cross multiply
143,433.73x = 197,943.36 × 78,905.68 - Step 4: Simplify right side
143,433.73x = 15,618,855,422.28 - Step 5: Solve for x
x = 15,618,855,422.28/143,433.73 - Step 6: Final answer
x = 108,892.49
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.