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Finding the Third Proportional to 56,408 and 87,204

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Solution

The third proportional to 56,408 and 87,204 is: 134,813.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,408 : 87,204 = 87,204 : x
  2. Step 2: Convert to fraction form
    56,408/87,204 = 87,204/x
  3. Step 3: Cross multiply
    56,408x = 87,204 × 87,204
  4. Step 4: Simplify right side
    56,408x = 7,604,537,616
  5. Step 5: Solve for x
    x = 7,604,537,616/56,408
  6. Step 6: Final answer
    x = 134,813.10

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.