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Finding the Fourth Proportional to 104.74, 156.84 and 75.73

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Solution

The fourth proportional to 104.74, 156.84 and 75.73 is: 113.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.74 : 156.84 = 75.73 : x
  2. Step 2: Convert to fraction form
    104.74/156.84 = 75.73/x
  3. Step 3: Cross multiply
    104.74x = 156.84 × 75.73
  4. Step 4: Simplify right side
    104.74x = 11,877.49
  5. Step 5: Solve for x
    x = 11,877.49/104.74
  6. Step 6: Final answer
    x = 113.40

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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.