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Finding the Fourth Proportional to 70,980.33, 106,469.97 and 21,056.28

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Solution

The fourth proportional to 70,980.33, 106,469.97 and 21,056.28 is: 31,584.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,980.33 : 106,469.97 = 21,056.28 : x
  2. Step 2: Convert to fraction form
    70,980.33/106,469.97 = 21,056.28/x
  3. Step 3: Cross multiply
    70,980.33x = 106,469.97 × 21,056.28
  4. Step 4: Simplify right side
    70,980.33x = 2,241,861,499.91
  5. Step 5: Solve for x
    x = 2,241,861,499.91/70,980.33
  6. Step 6: Final answer
    x = 31,584.26

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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.