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Finding the Third Proportional to 51,991.50 and 78,455.25

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Solution

The third proportional to 51,991.50 and 78,455.25 is: 118,389.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,991.50 : 78,455.25 = 78,455.25 : x
  2. Step 2: Convert to fraction form
    51,991.50/78,455.25 = 78,455.25/x
  3. Step 3: Cross multiply
    51,991.50x = 78,455.25 × 78,455.25
  4. Step 4: Simplify right side
    51,991.50x = 6,155,226,252.56
  5. Step 5: Solve for x
    x = 6,155,226,252.56/51,991.50
  6. Step 6: Final answer
    x = 118,389.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.