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Finding the Third Proportional to 42,087 and 70,137

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Solution

The third proportional to 42,087 and 70,137 is: 116,881.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,087 : 70,137 = 70,137 : x
  2. Step 2: Convert to fraction form
    42,087/70,137 = 70,137/x
  3. Step 3: Cross multiply
    42,087x = 70,137 × 70,137
  4. Step 4: Simplify right side
    42,087x = 4,919,198,769
  5. Step 5: Solve for x
    x = 4,919,198,769/42,087
  6. Step 6: Final answer
    x = 116,881.67

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.