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Finding the Fourth Proportional to 70,956.75, 106,435.13 and 28,859.73

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Solution

The fourth proportional to 70,956.75, 106,435.13 and 28,859.73 is: 43,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956.75 : 106,435.13 = 28,859.73 : x
  2. Step 2: Convert to fraction form
    70,956.75/106,435.13 = 28,859.73/x
  3. Step 3: Cross multiply
    70,956.75x = 106,435.13 × 28,859.73
  4. Step 4: Simplify right side
    70,956.75x = 3,071,689,369.15
  5. Step 5: Solve for x
    x = 3,071,689,369.15/70,956.75
  6. Step 6: Final answer
    x = 43,289.60

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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.