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Finding the Fourth Proportional to 71,168.37, 106,748.91 and 21,248.88

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Solution

The fourth proportional to 71,168.37, 106,748.91 and 21,248.88 is: 31,872.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,168.37 : 106,748.91 = 21,248.88 : x
  2. Step 2: Convert to fraction form
    71,168.37/106,748.91 = 21,248.88/x
  3. Step 3: Cross multiply
    71,168.37x = 106,748.91 × 21,248.88
  4. Step 4: Simplify right side
    71,168.37x = 2,268,294,778.72
  5. Step 5: Solve for x
    x = 2,268,294,778.72/71,168.37
  6. Step 6: Final answer
    x = 31,872.23

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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.