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Finding the Third Proportional to 64.88 and 139.88

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Solution

The third proportional to 64.88 and 139.88 is: 301.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.88 : 139.88 = 139.88 : x
  2. Step 2: Convert to fraction form
    64.88/139.88 = 139.88/x
  3. Step 3: Cross multiply
    64.88x = 139.88 × 139.88
  4. Step 4: Simplify right side
    64.88x = 19,565.02
  5. Step 5: Solve for x
    x = 19,565.02/64.88
  6. Step 6: Final answer
    x = 301.58

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.