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Finding the Third Proportional to 28,921 and 62,972

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Solution

The third proportional to 28,921 and 62,972 is: 137,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921 : 62,972 = 62,972 : x
  2. Step 2: Convert to fraction form
    28,921/62,972 = 62,972/x
  3. Step 3: Cross multiply
    28,921x = 62,972 × 62,972
  4. Step 4: Simplify right side
    28,921x = 3,965,472,784
  5. Step 5: Solve for x
    x = 3,965,472,784/28,921
  6. Step 6: Final answer
    x = 137,113.96

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.