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Finding the Fourth Proportional to 72,182.74, 108,272.90 and 21,581.88

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Solution

The fourth proportional to 72,182.74, 108,272.90 and 21,581.88 is: 32,372.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,182.74 : 108,272.90 = 21,581.88 : x
  2. Step 2: Convert to fraction form
    72,182.74/108,272.90 = 21,581.88/x
  3. Step 3: Cross multiply
    72,182.74x = 108,272.90 × 21,581.88
  4. Step 4: Simplify right side
    72,182.74x = 2,336,732,735.05
  5. Step 5: Solve for x
    x = 2,336,732,735.05/72,182.74
  6. Step 6: Final answer
    x = 32,372.46

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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.