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Finding the Third Proportional to 103,629 and 128,567

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Solution

The third proportional to 103,629 and 128,567 is: 159,506.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,629 : 128,567 = 128,567 : x
  2. Step 2: Convert to fraction form
    103,629/128,567 = 128,567/x
  3. Step 3: Cross multiply
    103,629x = 128,567 × 128,567
  4. Step 4: Simplify right side
    103,629x = 16,529,473,489
  5. Step 5: Solve for x
    x = 16,529,473,489/103,629
  6. Step 6: Final answer
    x = 159,506.25

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Why These Related Problems?

These problems maintain the same ratio (1.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.