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Finding the Fourth Proportional to 103,631.62, 155,447.45 and 28,751.77

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Solution

The fourth proportional to 103,631.62, 155,447.45 and 28,751.77 is: 43,127.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.62 : 155,447.45 = 28,751.77 : x
  2. Step 2: Convert to fraction form
    103,631.62/155,447.45 = 28,751.77/x
  3. Step 3: Cross multiply
    103,631.62x = 155,447.45 × 28,751.77
  4. Step 4: Simplify right side
    103,631.62x = 4,469,389,329.49
  5. Step 5: Solve for x
    x = 4,469,389,329.49/103,631.62
  6. Step 6: Final answer
    x = 43,127.66

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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.