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Finding the Fourth Proportional to 103,631.80, 155,447.68 and 28,751.94

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Solution

The fourth proportional to 103,631.80, 155,447.68 and 28,751.94 is: 43,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.80 : 155,447.68 = 28,751.94 : x
  2. Step 2: Convert to fraction form
    103,631.80/155,447.68 = 28,751.94/x
  3. Step 3: Cross multiply
    103,631.80x = 155,447.68 × 28,751.94
  4. Step 4: Simplify right side
    103,631.80x = 4,469,422,368.50
  5. Step 5: Solve for x
    x = 4,469,422,368.50/103,631.80
  6. Step 6: Final answer
    x = 43,127.90

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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.