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Finding the Fourth Proportional to 71,317.44, 106,971.84 and 18,725.76

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Solution

The fourth proportional to 71,317.44, 106,971.84 and 18,725.76 is: 28,087.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,317.44 : 106,971.84 = 18,725.76 : x
  2. Step 2: Convert to fraction form
    71,317.44/106,971.84 = 18,725.76/x
  3. Step 3: Cross multiply
    71,317.44x = 106,971.84 × 18,725.76
  4. Step 4: Simplify right side
    71,317.44x = 2,003,129,002.60
  5. Step 5: Solve for x
    x = 2,003,129,002.60/71,317.44
  6. Step 6: Final answer
    x = 28,087.51

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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.