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Finding the Fourth Proportional to 71,669.88, 107,500.56 and 21,750.39

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Solution

The fourth proportional to 71,669.88, 107,500.56 and 21,750.39 is: 32,624.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,669.88 : 107,500.56 = 21,750.39 : x
  2. Step 2: Convert to fraction form
    71,669.88/107,500.56 = 21,750.39/x
  3. Step 3: Cross multiply
    71,669.88x = 107,500.56 × 21,750.39
  4. Step 4: Simplify right side
    71,669.88x = 2,338,178,567.72
  5. Step 5: Solve for x
    x = 2,338,178,567.72/71,669.88
  6. Step 6: Final answer
    x = 32,624.29

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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.