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Finding the Fourth Proportional to 79,792.70, 119,693.16 and 20,628.89

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Solution

The fourth proportional to 79,792.70, 119,693.16 and 20,628.89 is: 30,944.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,792.70 : 119,693.16 = 20,628.89 : x
  2. Step 2: Convert to fraction form
    79,792.70/119,693.16 = 20,628.89/x
  3. Step 3: Cross multiply
    79,792.70x = 119,693.16 × 20,628.89
  4. Step 4: Simplify right side
    79,792.70x = 2,469,136,432.93
  5. Step 5: Solve for x
    x = 2,469,136,432.93/79,792.70
  6. Step 6: Final answer
    x = 30,944.39

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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.