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Finding the Third Proportional to 85,710 and 128,484

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Solution

The third proportional to 85,710 and 128,484 is: 192,604.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,710 : 128,484 = 128,484 : x
  2. Step 2: Convert to fraction form
    85,710/128,484 = 128,484/x
  3. Step 3: Cross multiply
    85,710x = 128,484 × 128,484
  4. Step 4: Simplify right side
    85,710x = 16,508,138,256
  5. Step 5: Solve for x
    x = 16,508,138,256/85,710
  6. Step 6: Final answer
    x = 192,604.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.