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Finding the Fourth Proportional to 70,867.91, 106,306.88 and 28,747.09

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Solution

The fourth proportional to 70,867.91, 106,306.88 and 28,747.09 is: 43,122.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,867.91 : 106,306.88 = 28,747.09 : x
  2. Step 2: Convert to fraction form
    70,867.91/106,306.88 = 28,747.09/x
  3. Step 3: Cross multiply
    70,867.91x = 106,306.88 × 28,747.09
  4. Step 4: Simplify right side
    70,867.91x = 3,056,013,448.34
  5. Step 5: Solve for x
    x = 3,056,013,448.34/70,867.91
  6. Step 6: Final answer
    x = 43,122.67

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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.