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Finding the Third Proportional to 63,487 and 139,428

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Solution

The third proportional to 63,487 and 139,428 is: 306,207.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,487 : 139,428 = 139,428 : x
  2. Step 2: Convert to fraction form
    63,487/139,428 = 139,428/x
  3. Step 3: Cross multiply
    63,487x = 139,428 × 139,428
  4. Step 4: Simplify right side
    63,487x = 19,440,167,184
  5. Step 5: Solve for x
    x = 19,440,167,184/63,487
  6. Step 6: Final answer
    x = 306,207.05

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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.