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Finding the Fourth Proportional to 103.59, 155.41 and 52.26

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Solution

The fourth proportional to 103.59, 155.41 and 52.26 is: 78.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.59 : 155.41 = 52.26 : x
  2. Step 2: Convert to fraction form
    103.59/155.41 = 52.26/x
  3. Step 3: Cross multiply
    103.59x = 155.41 × 52.26
  4. Step 4: Simplify right side
    103.59x = 8,121.73
  5. Step 5: Solve for x
    x = 8,121.73/103.59
  6. Step 6: Final answer
    x = 78.40

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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.