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Finding the Third Proportional to 77,859 and 107,856.50

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Solution

The third proportional to 77,859 and 107,856.50 is: 149,411.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,859 : 107,856.50 = 107,856.50 : x
  2. Step 2: Convert to fraction form
    77,859/107,856.50 = 107,856.50/x
  3. Step 3: Cross multiply
    77,859x = 107,856.50 × 107,856.50
  4. Step 4: Simplify right side
    77,859x = 11,633,024,592.25
  5. Step 5: Solve for x
    x = 11,633,024,592.25/77,859
  6. Step 6: Final answer
    x = 149,411.43

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.