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Finding the Third Proportional to 63,428 and 139,411

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Solution

The third proportional to 63,428 and 139,411 is: 306,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,428 : 139,411 = 139,411 : x
  2. Step 2: Convert to fraction form
    63,428/139,411 = 139,411/x
  3. Step 3: Cross multiply
    63,428x = 139,411 × 139,411
  4. Step 4: Simplify right side
    63,428x = 19,435,426,921
  5. Step 5: Solve for x
    x = 19,435,426,921/63,428
  6. Step 6: Final answer
    x = 306,417.15

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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.