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Finding the Fourth Proportional to 103,631.49, 155,446.87 and 28,751.49

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Solution

The fourth proportional to 103,631.49, 155,446.87 and 28,751.49 is: 43,127.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.49 : 155,446.87 = 28,751.49 : x
  2. Step 2: Convert to fraction form
    103,631.49/155,446.87 = 28,751.49/x
  3. Step 3: Cross multiply
    103,631.49x = 155,446.87 × 28,751.49
  4. Step 4: Simplify right side
    103,631.49x = 4,469,329,128.34
  5. Step 5: Solve for x
    x = 4,469,329,128.34/103,631.49
  6. Step 6: Final answer
    x = 43,127.13

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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.