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Finding the Fourth Proportional to 71,292.34, 106,908.39 and 21,379.54

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Solution

The fourth proportional to 71,292.34, 106,908.39 and 21,379.54 is: 32,060.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,292.34 : 106,908.39 = 21,379.54 : x
  2. Step 2: Convert to fraction form
    71,292.34/106,908.39 = 21,379.54/x
  3. Step 3: Cross multiply
    71,292.34x = 106,908.39 × 21,379.54
  4. Step 4: Simplify right side
    71,292.34x = 2,285,652,200.34
  5. Step 5: Solve for x
    x = 2,285,652,200.34/71,292.34
  6. Step 6: Final answer
    x = 32,060.28

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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.