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Finding the Fourth Proportional to 104,809.80, 156,905.28 and 69,205.44

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Solution

The fourth proportional to 104,809.80, 156,905.28 and 69,205.44 is: 103,603.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,809.80 : 156,905.28 = 69,205.44 : x
  2. Step 2: Convert to fraction form
    104,809.80/156,905.28 = 69,205.44/x
  3. Step 3: Cross multiply
    104,809.80x = 156,905.28 × 69,205.44
  4. Step 4: Simplify right side
    104,809.80x = 10,858,698,940.72
  5. Step 5: Solve for x
    x = 10,858,698,940.72/104,809.80
  6. Step 6: Final answer
    x = 103,603.85

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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.