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Finding the Third Proportional to 29,784 and 64,128

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Solution

The third proportional to 29,784 and 64,128 is: 138,074.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,784 : 64,128 = 64,128 : x
  2. Step 2: Convert to fraction form
    29,784/64,128 = 64,128/x
  3. Step 3: Cross multiply
    29,784x = 64,128 × 64,128
  4. Step 4: Simplify right side
    29,784x = 4,112,400,384
  5. Step 5: Solve for x
    x = 4,112,400,384/29,784
  6. Step 6: Final answer
    x = 138,074.15

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.