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Finding the Fourth Proportional to 72,473.20, 108,709.80 and 19,882.60

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Solution

The fourth proportional to 72,473.20, 108,709.80 and 19,882.60 is: 29,823.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,473.20 : 108,709.80 = 19,882.60 : x
  2. Step 2: Convert to fraction form
    72,473.20/108,709.80 = 19,882.60/x
  3. Step 3: Cross multiply
    72,473.20x = 108,709.80 × 19,882.60
  4. Step 4: Simplify right side
    72,473.20x = 2,161,433,469.48
  5. Step 5: Solve for x
    x = 2,161,433,469.48/72,473.20
  6. Step 6: Final answer
    x = 29,823.90

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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.