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Finding the Fourth Proportional to 103,910.43, 155,817.20 and 53,977.13

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Solution

The fourth proportional to 103,910.43, 155,817.20 and 53,977.13 is: 80,940.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,910.43 : 155,817.20 = 53,977.13 : x
  2. Step 2: Convert to fraction form
    103,910.43/155,817.20 = 53,977.13/x
  3. Step 3: Cross multiply
    103,910.43x = 155,817.20 × 53,977.13
  4. Step 4: Simplify right side
    103,910.43x = 8,410,565,260.64
  5. Step 5: Solve for x
    x = 8,410,565,260.64/103,910.43
  6. Step 6: Final answer
    x = 80,940.53

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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.