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Finding the Third Proportional to 28,260 and 43,742

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Solution

The third proportional to 28,260 and 43,742 is: 67,705.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,260 : 43,742 = 43,742 : x
  2. Step 2: Convert to fraction form
    28,260/43,742 = 43,742/x
  3. Step 3: Cross multiply
    28,260x = 43,742 × 43,742
  4. Step 4: Simplify right side
    28,260x = 1,913,362,564
  5. Step 5: Solve for x
    x = 1,913,362,564/28,260
  6. Step 6: Final answer
    x = 67,705.68

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.