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Finding the Fourth Proportional to 104.44, 155.81 and 99.40

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Solution

The fourth proportional to 104.44, 155.81 and 99.40 is: 148.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.44 : 155.81 = 99.40 : x
  2. Step 2: Convert to fraction form
    104.44/155.81 = 99.40/x
  3. Step 3: Cross multiply
    104.44x = 155.81 × 99.40
  4. Step 4: Simplify right side
    104.44x = 15,487.51
  5. Step 5: Solve for x
    x = 15,487.51/104.44
  6. Step 6: Final answer
    x = 148.29

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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.