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Finding the Third Proportional to 64,715 and 138,428

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Solution

The third proportional to 64,715 and 138,428 is: 296,103.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,715 : 138,428 = 138,428 : x
  2. Step 2: Convert to fraction form
    64,715/138,428 = 138,428/x
  3. Step 3: Cross multiply
    64,715x = 138,428 × 138,428
  4. Step 4: Simplify right side
    64,715x = 19,162,311,184
  5. Step 5: Solve for x
    x = 19,162,311,184/64,715
  6. Step 6: Final answer
    x = 296,103.09

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.