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Finding the Fourth Proportional to 43,189, 64,679.01 and 20,947.30

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Solution

The fourth proportional to 43,189, 64,679.01 and 20,947.30 is: 31,370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,189 : 64,679.01 = 20,947.30 : x
  2. Step 2: Convert to fraction form
    43,189/64,679.01 = 20,947.30/x
  3. Step 3: Cross multiply
    43,189x = 64,679.01 × 20,947.30
  4. Step 4: Simplify right side
    43,189x = 1,354,850,626.17
  5. Step 5: Solve for x
    x = 1,354,850,626.17/43,189
  6. Step 6: Final answer
    x = 31,370.27

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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.