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Finding the Fourth Proportional to 70,753.22, 106,129.93 and 20,833.90

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Solution

The fourth proportional to 70,753.22, 106,129.93 and 20,833.90 is: 31,250.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,753.22 : 106,129.93 = 20,833.90 : x
  2. Step 2: Convert to fraction form
    70,753.22/106,129.93 = 20,833.90/x
  3. Step 3: Cross multiply
    70,753.22x = 106,129.93 × 20,833.90
  4. Step 4: Simplify right side
    70,753.22x = 2,211,100,348.63
  5. Step 5: Solve for x
    x = 2,211,100,348.63/70,753.22
  6. Step 6: Final answer
    x = 31,250.88

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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.