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Finding the Fourth Proportional to 104,171.80, 155,990.80 and 72,106.44

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Solution

The fourth proportional to 104,171.80, 155,990.80 and 72,106.44 is: 107,974.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,171.80 : 155,990.80 = 72,106.44 : x
  2. Step 2: Convert to fraction form
    104,171.80/155,990.80 = 72,106.44/x
  3. Step 3: Cross multiply
    104,171.80x = 155,990.80 × 72,106.44
  4. Step 4: Simplify right side
    104,171.80x = 11,247,941,260.75
  5. Step 5: Solve for x
    x = 11,247,941,260.75/104,171.80
  6. Step 6: Final answer
    x = 107,974.92

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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.