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Finding the Fourth Proportional to 133.89, 184.73 and 78.60

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Solution

The fourth proportional to 133.89, 184.73 and 78.60 is: 108.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.89 : 184.73 = 78.60 : x
  2. Step 2: Convert to fraction form
    133.89/184.73 = 78.60/x
  3. Step 3: Cross multiply
    133.89x = 184.73 × 78.60
  4. Step 4: Simplify right side
    133.89x = 14,519.39
  5. Step 5: Solve for x
    x = 14,519.39/133.89
  6. Step 6: Final answer
    x = 108.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.