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Finding the Fourth Proportional to 71,778.96, 107,672.31 and 21,860.64

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Solution

The fourth proportional to 71,778.96, 107,672.31 and 21,860.64 is: 32,792.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,778.96 : 107,672.31 = 21,860.64 : x
  2. Step 2: Convert to fraction form
    71,778.96/107,672.31 = 21,860.64/x
  3. Step 3: Cross multiply
    71,778.96x = 107,672.31 × 21,860.64
  4. Step 4: Simplify right side
    71,778.96x = 2,353,785,606.88
  5. Step 5: Solve for x
    x = 2,353,785,606.88/71,778.96
  6. Step 6: Final answer
    x = 32,792.14

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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.