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Finding the Fourth Proportional to 184.78, 277.50 and 103.78

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Solution

The fourth proportional to 184.78, 277.50 and 103.78 is: 155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.78 : 277.50 = 103.78 : x
  2. Step 2: Convert to fraction form
    184.78/277.50 = 103.78/x
  3. Step 3: Cross multiply
    184.78x = 277.50 × 103.78
  4. Step 4: Simplify right side
    184.78x = 28,797.56
  5. Step 5: Solve for x
    x = 28,797.56/184.78
  6. Step 6: Final answer
    x = 155.85

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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.