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Finding the Fourth Proportional to 103,630.70, 155,449.36 and 28,751.60

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Solution

The fourth proportional to 103,630.70, 155,449.36 and 28,751.60 is: 43,128.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,630.70 : 155,449.36 = 28,751.60 : x
  2. Step 2: Convert to fraction form
    103,630.70/155,449.36 = 28,751.60/x
  3. Step 3: Cross multiply
    103,630.70x = 155,449.36 × 28,751.60
  4. Step 4: Simplify right side
    103,630.70x = 4,469,417,818.98
  5. Step 5: Solve for x
    x = 4,469,417,818.98/103,630.70
  6. Step 6: Final answer
    x = 43,128.32

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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.