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Finding the Fourth Proportional to 113,638, 170,481.61 and 43,517.32

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Solution

The fourth proportional to 113,638, 170,481.61 and 43,517.32 is: 65,285.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,638 : 170,481.61 = 43,517.32 : x
  2. Step 2: Convert to fraction form
    113,638/170,481.61 = 43,517.32/x
  3. Step 3: Cross multiply
    113,638x = 170,481.61 × 43,517.32
  4. Step 4: Simplify right side
    113,638x = 7,418,902,776.49
  5. Step 5: Solve for x
    x = 7,418,902,776.49/113,638
  6. Step 6: Final answer
    x = 65,285.40

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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.