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Finding the Fourth Proportional to 103.82, 155.81 and 58.19

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Solution

The fourth proportional to 103.82, 155.81 and 58.19 is: 87.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.82 : 155.81 = 58.19 : x
  2. Step 2: Convert to fraction form
    103.82/155.81 = 58.19/x
  3. Step 3: Cross multiply
    103.82x = 155.81 × 58.19
  4. Step 4: Simplify right side
    103.82x = 9,065.95
  5. Step 5: Solve for x
    x = 9,065.95/103.82
  6. Step 6: Final answer
    x = 87.33

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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.