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Finding the Third Proportional to 48,720 and 64,788

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Solution

The third proportional to 48,720 and 64,788 is: 86,155.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,720 : 64,788 = 64,788 : x
  2. Step 2: Convert to fraction form
    48,720/64,788 = 64,788/x
  3. Step 3: Cross multiply
    48,720x = 64,788 × 64,788
  4. Step 4: Simplify right side
    48,720x = 4,197,484,944
  5. Step 5: Solve for x
    x = 4,197,484,944/48,720
  6. Step 6: Final answer
    x = 86,155.27

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.