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Finding the Third Proportional to 80,028 and 128,910

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Solution

The third proportional to 80,028 and 128,910 is: 207,649.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,028 : 128,910 = 128,910 : x
  2. Step 2: Convert to fraction form
    80,028/128,910 = 128,910/x
  3. Step 3: Cross multiply
    80,028x = 128,910 × 128,910
  4. Step 4: Simplify right side
    80,028x = 16,617,788,100
  5. Step 5: Solve for x
    x = 16,617,788,100/80,028
  6. Step 6: Final answer
    x = 207,649.67

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.