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Finding the Fourth Proportional to 70,883.36, 106,344.40 and 20,965.92

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Solution

The fourth proportional to 70,883.36, 106,344.40 and 20,965.92 is: 31,454.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,883.36 : 106,344.40 = 20,965.92 : x
  2. Step 2: Convert to fraction form
    70,883.36/106,344.40 = 20,965.92/x
  3. Step 3: Cross multiply
    70,883.36x = 106,344.40 × 20,965.92
  4. Step 4: Simplify right side
    70,883.36x = 2,229,608,182.85
  5. Step 5: Solve for x
    x = 2,229,608,182.85/70,883.36
  6. Step 6: Final answer
    x = 31,454.61

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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.