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Finding the Fourth Proportional to 104.05, 155.35 and 89.37

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Solution

The fourth proportional to 104.05, 155.35 and 89.37 is: 133.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.05 : 155.35 = 89.37 : x
  2. Step 2: Convert to fraction form
    104.05/155.35 = 89.37/x
  3. Step 3: Cross multiply
    104.05x = 155.35 × 89.37
  4. Step 4: Simplify right side
    104.05x = 13,883.74
  5. Step 5: Solve for x
    x = 13,883.74/104.05
  6. Step 6: Final answer
    x = 133.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.