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Finding the Third Proportional to 85,380 and 128,352

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Solution

The third proportional to 85,380 and 128,352 is: 192,951.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,380 : 128,352 = 128,352 : x
  2. Step 2: Convert to fraction form
    85,380/128,352 = 128,352/x
  3. Step 3: Cross multiply
    85,380x = 128,352 × 128,352
  4. Step 4: Simplify right side
    85,380x = 16,474,235,904
  5. Step 5: Solve for x
    x = 16,474,235,904/85,380
  6. Step 6: Final answer
    x = 192,951.93

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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.