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Finding the Third Proportional to 28,930 and 63,408

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Solution

The third proportional to 28,930 and 63,408 is: 138,975.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930 : 63,408 = 63,408 : x
  2. Step 2: Convert to fraction form
    28,930/63,408 = 63,408/x
  3. Step 3: Cross multiply
    28,930x = 63,408 × 63,408
  4. Step 4: Simplify right side
    28,930x = 4,020,574,464
  5. Step 5: Solve for x
    x = 4,020,574,464/28,930
  6. Step 6: Final answer
    x = 138,975.96

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.