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Finding the Fourth Proportional to 70,912.02, 106,367.70 and 20,992.41

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Solution

The fourth proportional to 70,912.02, 106,367.70 and 20,992.41 is: 31,488.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,912.02 : 106,367.70 = 20,992.41 : x
  2. Step 2: Convert to fraction form
    70,912.02/106,367.70 = 20,992.41/x
  3. Step 3: Cross multiply
    70,912.02x = 106,367.70 × 20,992.41
  4. Step 4: Simplify right side
    70,912.02x = 2,232,914,369.16
  5. Step 5: Solve for x
    x = 2,232,914,369.16/70,912.02
  6. Step 6: Final answer
    x = 31,488.52

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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.