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Finding the Fourth Proportional to 252,222.76, 378,355.86 and 72,308.90

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Solution

The fourth proportional to 252,222.76, 378,355.86 and 72,308.90 is: 108,469.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,222.76 : 378,355.86 = 72,308.90 : x
  2. Step 2: Convert to fraction form
    252,222.76/378,355.86 = 72,308.90/x
  3. Step 3: Cross multiply
    252,222.76x = 378,355.86 × 72,308.90
  4. Step 4: Simplify right side
    252,222.76x = 27,358,496,991.04
  5. Step 5: Solve for x
    x = 27,358,496,991.04/252,222.76
  6. Step 6: Final answer
    x = 108,469.58

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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.