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Finding the Fourth Proportional to 71,108, 106,679.28 and 21,860

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Solution

The fourth proportional to 71,108, 106,679.28 and 21,860 is: 32,795.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,108 : 106,679.28 = 21,860 : x
  2. Step 2: Convert to fraction form
    71,108/106,679.28 = 21,860/x
  3. Step 3: Cross multiply
    71,108x = 106,679.28 × 21,860
  4. Step 4: Simplify right side
    71,108x = 2,332,009,060.80
  5. Step 5: Solve for x
    x = 2,332,009,060.80/71,108
  6. Step 6: Final answer
    x = 32,795.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.