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Finding the Fourth Proportional to 103,668.62, 155,484.09 and 28,769.94

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Solution

The fourth proportional to 103,668.62, 155,484.09 and 28,769.94 is: 43,149.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.62 : 155,484.09 = 28,769.94 : x
  2. Step 2: Convert to fraction form
    103,668.62/155,484.09 = 28,769.94/x
  3. Step 3: Cross multiply
    103,668.62x = 155,484.09 × 28,769.94
  4. Step 4: Simplify right side
    103,668.62x = 4,473,267,940.25
  5. Step 5: Solve for x
    x = 4,473,267,940.25/103,668.62
  6. Step 6: Final answer
    x = 43,149.68

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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.