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Finding the Third Proportional to 64,290 and 139,272

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Solution

The third proportional to 64,290 and 139,272 is: 301,706.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,290 : 139,272 = 139,272 : x
  2. Step 2: Convert to fraction form
    64,290/139,272 = 139,272/x
  3. Step 3: Cross multiply
    64,290x = 139,272 × 139,272
  4. Step 4: Simplify right side
    64,290x = 19,396,689,984
  5. Step 5: Solve for x
    x = 19,396,689,984/64,290
  6. Step 6: Final answer
    x = 301,706.17

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.