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Finding the Fourth Proportional to 103,668.37, 155,483.71 and 28,769.69

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Solution

The fourth proportional to 103,668.37, 155,483.71 and 28,769.69 is: 43,149.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.37 : 155,483.71 = 28,769.69 : x
  2. Step 2: Convert to fraction form
    103,668.37/155,483.71 = 28,769.69/x
  3. Step 3: Cross multiply
    103,668.37x = 155,483.71 × 28,769.69
  4. Step 4: Simplify right side
    103,668.37x = 4,473,218,136.75
  5. Step 5: Solve for x
    x = 4,473,218,136.75/103,668.37
  6. Step 6: Final answer
    x = 43,149.31

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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.