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Finding the Fourth Proportional to 103,630.94, 155,449.74 and 28,751.84

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Solution

The fourth proportional to 103,630.94, 155,449.74 and 28,751.84 is: 43,128.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,630.94 : 155,449.74 = 28,751.84 : x
  2. Step 2: Convert to fraction form
    103,630.94/155,449.74 = 28,751.84/x
  3. Step 3: Cross multiply
    103,630.94x = 155,449.74 × 28,751.84
  4. Step 4: Simplify right side
    103,630.94x = 4,469,466,052.52
  5. Step 5: Solve for x
    x = 4,469,466,052.52/103,630.94
  6. Step 6: Final answer
    x = 43,128.68

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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.