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Finding the Third Proportional to 63,911 and 139,486

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Solution

The third proportional to 63,911 and 139,486 is: 304,428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,911 : 139,486 = 139,486 : x
  2. Step 2: Convert to fraction form
    63,911/139,486 = 139,486/x
  3. Step 3: Cross multiply
    63,911x = 139,486 × 139,486
  4. Step 4: Simplify right side
    63,911x = 19,456,344,196
  5. Step 5: Solve for x
    x = 19,456,344,196/63,911
  6. Step 6: Final answer
    x = 304,428.72

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.