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Finding the Third Proportional to 40,439 and 87,574

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Solution

The third proportional to 40,439 and 87,574 is: 189,648.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,439 : 87,574 = 87,574 : x
  2. Step 2: Convert to fraction form
    40,439/87,574 = 87,574/x
  3. Step 3: Cross multiply
    40,439x = 87,574 × 87,574
  4. Step 4: Simplify right side
    40,439x = 7,669,205,476
  5. Step 5: Solve for x
    x = 7,669,205,476/40,439
  6. Step 6: Final answer
    x = 189,648.74

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.