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Finding the Fourth Proportional to 103,604.39, 155,391.17 and 28,716.71

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Solution

The fourth proportional to 103,604.39, 155,391.17 and 28,716.71 is: 43,070.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,604.39 : 155,391.17 = 28,716.71 : x
  2. Step 2: Convert to fraction form
    103,604.39/155,391.17 = 28,716.71/x
  3. Step 3: Cross multiply
    103,604.39x = 155,391.17 × 28,716.71
  4. Step 4: Simplify right side
    103,604.39x = 4,462,322,244.91
  5. Step 5: Solve for x
    x = 4,462,322,244.91/103,604.39
  6. Step 6: Final answer
    x = 43,070.79

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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.