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Finding the Third Proportional to 84,123 and 129,303

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Solution

The third proportional to 84,123 and 129,303 is: 198,747.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,123 : 129,303 = 129,303 : x
  2. Step 2: Convert to fraction form
    84,123/129,303 = 129,303/x
  3. Step 3: Cross multiply
    84,123x = 129,303 × 129,303
  4. Step 4: Simplify right side
    84,123x = 16,719,265,809
  5. Step 5: Solve for x
    x = 16,719,265,809/84,123
  6. Step 6: Final answer
    x = 198,747.86

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.