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Finding the Third Proportional to 70,434 and 105,631

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Solution

The third proportional to 70,434 and 105,631 is: 158,416.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,434 : 105,631 = 105,631 : x
  2. Step 2: Convert to fraction form
    70,434/105,631 = 105,631/x
  3. Step 3: Cross multiply
    70,434x = 105,631 × 105,631
  4. Step 4: Simplify right side
    70,434x = 11,157,908,161
  5. Step 5: Solve for x
    x = 11,157,908,161/70,434
  6. Step 6: Final answer
    x = 158,416.51

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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.