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Finding the Third Proportional to 28,720 and 43,110

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Solution

The third proportional to 28,720 and 43,110 is: 64,710.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720 : 43,110 = 43,110 : x
  2. Step 2: Convert to fraction form
    28,720/43,110 = 43,110/x
  3. Step 3: Cross multiply
    28,720x = 43,110 × 43,110
  4. Step 4: Simplify right side
    28,720x = 1,858,472,100
  5. Step 5: Solve for x
    x = 1,858,472,100/28,720
  6. Step 6: Final answer
    x = 64,710.03

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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.