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Finding the Third Proportional to 42,698.50 and 68,212

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Solution

The third proportional to 42,698.50 and 68,212 is: 108,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,698.50 : 68,212 = 68,212 : x
  2. Step 2: Convert to fraction form
    42,698.50/68,212 = 68,212/x
  3. Step 3: Cross multiply
    42,698.50x = 68,212 × 68,212
  4. Step 4: Simplify right side
    42,698.50x = 4,652,876,944
  5. Step 5: Solve for x
    x = 4,652,876,944/42,698.50
  6. Step 6: Final answer
    x = 108,970.50

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.