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Finding the Fourth Proportional to 71,114.46, 106,671.65 and 21,193.28

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Solution

The fourth proportional to 71,114.46, 106,671.65 and 21,193.28 is: 31,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,114.46 : 106,671.65 = 21,193.28 : x
  2. Step 2: Convert to fraction form
    71,114.46/106,671.65 = 21,193.28/x
  3. Step 3: Cross multiply
    71,114.46x = 106,671.65 × 21,193.28
  4. Step 4: Simplify right side
    71,114.46x = 2,260,721,507.19
  5. Step 5: Solve for x
    x = 2,260,721,507.19/71,114.46
  6. Step 6: Final answer
    x = 31,789.90

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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.