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Finding the Third Proportional to 63,431 and 139,417

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Solution

The third proportional to 63,431 and 139,417 is: 306,429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,431 : 139,417 = 139,417 : x
  2. Step 2: Convert to fraction form
    63,431/139,417 = 139,417/x
  3. Step 3: Cross multiply
    63,431x = 139,417 × 139,417
  4. Step 4: Simplify right side
    63,431x = 19,437,099,889
  5. Step 5: Solve for x
    x = 19,437,099,889/63,431
  6. Step 6: Final answer
    x = 306,429.03

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.