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Finding the Fourth Proportional to 72,693.80, 109,073.10 and 33,230.60

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Solution

The fourth proportional to 72,693.80, 109,073.10 and 33,230.60 is: 49,860.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,693.80 : 109,073.10 = 33,230.60 : x
  2. Step 2: Convert to fraction form
    72,693.80/109,073.10 = 33,230.60/x
  3. Step 3: Cross multiply
    72,693.80x = 109,073.10 × 33,230.60
  4. Step 4: Simplify right side
    72,693.80x = 3,624,564,556.86
  5. Step 5: Solve for x
    x = 3,624,564,556.86/72,693.80
  6. Step 6: Final answer
    x = 49,860.71

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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.