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Finding the Fourth Proportional to 70,855.23, 106,255.49 and 28,724.79

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Solution

The fourth proportional to 70,855.23, 106,255.49 and 28,724.79 is: 43,076.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,855.23 : 106,255.49 = 28,724.79 : x
  2. Step 2: Convert to fraction form
    70,855.23/106,255.49 = 28,724.79/x
  3. Step 3: Cross multiply
    70,855.23x = 106,255.49 × 28,724.79
  4. Step 4: Simplify right side
    70,855.23x = 3,052,166,492.97
  5. Step 5: Solve for x
    x = 3,052,166,492.97/70,855.23
  6. Step 6: Final answer
    x = 43,076.09

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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.