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Finding the Third Proportional to 139.75 and 204.88

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Solution

The third proportional to 139.75 and 204.88 is: 300.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.75 : 204.88 = 204.88 : x
  2. Step 2: Convert to fraction form
    139.75/204.88 = 204.88/x
  3. Step 3: Cross multiply
    139.75x = 204.88 × 204.88
  4. Step 4: Simplify right side
    139.75x = 41,973.77
  5. Step 5: Solve for x
    x = 41,973.77/139.75
  6. Step 6: Final answer
    x = 300.35

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.