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Finding the Fourth Proportional to 71,247.28, 106,968.12 and 36,211.72

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Solution

The fourth proportional to 71,247.28, 106,968.12 and 36,211.72 is: 54,366.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,247.28 : 106,968.12 = 36,211.72 : x
  2. Step 2: Convert to fraction form
    71,247.28/106,968.12 = 36,211.72/x
  3. Step 3: Cross multiply
    71,247.28x = 106,968.12 × 36,211.72
  4. Step 4: Simplify right side
    71,247.28x = 3,873,499,610.37
  5. Step 5: Solve for x
    x = 3,873,499,610.37/71,247.28
  6. Step 6: Final answer
    x = 54,366.98

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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.