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Finding the Third Proportional to 28,515 and 68,695.50

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Solution

The third proportional to 28,515 and 68,695.50 is: 165,494.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515 : 68,695.50 = 68,695.50 : x
  2. Step 2: Convert to fraction form
    28,515/68,695.50 = 68,695.50/x
  3. Step 3: Cross multiply
    28,515x = 68,695.50 × 68,695.50
  4. Step 4: Simplify right side
    28,515x = 4,719,071,720.25
  5. Step 5: Solve for x
    x = 4,719,071,720.25/28,515
  6. Step 6: Final answer
    x = 165,494.36

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.