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Finding the Fourth Proportional to 67,408.90, 101,128.92 and 20,022.96

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Solution

The fourth proportional to 67,408.90, 101,128.92 and 20,022.96 is: 30,039.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,408.90 : 101,128.92 = 20,022.96 : x
  2. Step 2: Convert to fraction form
    67,408.90/101,128.92 = 20,022.96/x
  3. Step 3: Cross multiply
    67,408.90x = 101,128.92 × 20,022.96
  4. Step 4: Simplify right side
    67,408.90x = 2,024,900,320.00
  5. Step 5: Solve for x
    x = 2,024,900,320.00/67,408.90
  6. Step 6: Final answer
    x = 30,039.06

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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.