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Finding the Third Proportional to 40,858 and 85,459

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Solution

The third proportional to 40,858 and 85,459 is: 178,746.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,858 : 85,459 = 85,459 : x
  2. Step 2: Convert to fraction form
    40,858/85,459 = 85,459/x
  3. Step 3: Cross multiply
    40,858x = 85,459 × 85,459
  4. Step 4: Simplify right side
    40,858x = 7,303,240,681
  5. Step 5: Solve for x
    x = 7,303,240,681/40,858
  6. Step 6: Final answer
    x = 178,746.90

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.