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Finding the Fourth Proportional to 71,239.88, 106,820.33 and 29,149.49

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Solution

The fourth proportional to 71,239.88, 106,820.33 and 29,149.49 is: 43,708.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,239.88 : 106,820.33 = 29,149.49 : x
  2. Step 2: Convert to fraction form
    71,239.88/106,820.33 = 29,149.49/x
  3. Step 3: Cross multiply
    71,239.88x = 106,820.33 × 29,149.49
  4. Step 4: Simplify right side
    71,239.88x = 3,113,758,262.44
  5. Step 5: Solve for x
    x = 3,113,758,262.44/71,239.88
  6. Step 6: Final answer
    x = 43,708.08

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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.