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Finding the Fourth Proportional to 103,668.93, 155,503.13 and 28,789.11

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Solution

The fourth proportional to 103,668.93, 155,503.13 and 28,789.11 is: 43,183.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.93 : 155,503.13 = 28,789.11 : x
  2. Step 2: Convert to fraction form
    103,668.93/155,503.13 = 28,789.11/x
  3. Step 3: Cross multiply
    103,668.93x = 155,503.13 × 28,789.11
  4. Step 4: Simplify right side
    103,668.93x = 4,476,796,570.97
  5. Step 5: Solve for x
    x = 4,476,796,570.97/103,668.93
  6. Step 6: Final answer
    x = 43,183.59

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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.