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Finding the Fourth Proportional to 84,645.90, 126,936.09 and 45,181.53

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Solution

The fourth proportional to 84,645.90, 126,936.09 and 45,181.53 is: 67,754.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,645.90 : 126,936.09 = 45,181.53 : x
  2. Step 2: Convert to fraction form
    84,645.90/126,936.09 = 45,181.53/x
  3. Step 3: Cross multiply
    84,645.90x = 126,936.09 × 45,181.53
  4. Step 4: Simplify right side
    84,645.90x = 5,735,166,758.42
  5. Step 5: Solve for x
    x = 5,735,166,758.42/84,645.90
  6. Step 6: Final answer
    x = 67,754.81

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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.