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Finding the Fourth Proportional to 71,511.37, 107,267.81 and 21,591.88

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Solution

The fourth proportional to 71,511.37, 107,267.81 and 21,591.88 is: 32,388.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,511.37 : 107,267.81 = 21,591.88 : x
  2. Step 2: Convert to fraction form
    71,511.37/107,267.81 = 21,591.88/x
  3. Step 3: Cross multiply
    71,511.37x = 107,267.81 × 21,591.88
  4. Step 4: Simplify right side
    71,511.37x = 2,316,113,305.25
  5. Step 5: Solve for x
    x = 2,316,113,305.25/71,511.37
  6. Step 6: Final answer
    x = 32,388.04

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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.