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Finding the Third Proportional to 91,730 and 189,170

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Solution

The third proportional to 91,730 and 189,170 is: 390,115.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,730 : 189,170 = 189,170 : x
  2. Step 2: Convert to fraction form
    91,730/189,170 = 189,170/x
  3. Step 3: Cross multiply
    91,730x = 189,170 × 189,170
  4. Step 4: Simplify right side
    91,730x = 35,785,288,900
  5. Step 5: Solve for x
    x = 35,785,288,900/91,730
  6. Step 6: Final answer
    x = 390,115.44

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.