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Finding the Third Proportional to 43,665.75 and 78,219

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Solution

The third proportional to 43,665.75 and 78,219 is: 140,114.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,665.75 : 78,219 = 78,219 : x
  2. Step 2: Convert to fraction form
    43,665.75/78,219 = 78,219/x
  3. Step 3: Cross multiply
    43,665.75x = 78,219 × 78,219
  4. Step 4: Simplify right side
    43,665.75x = 6,118,211,961
  5. Step 5: Solve for x
    x = 6,118,211,961/43,665.75
  6. Step 6: Final answer
    x = 140,114.67

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.