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Finding the Fourth Proportional to 111.02, 165.41 and 104.03

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Solution

The fourth proportional to 111.02, 165.41 and 104.03 is: 155.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.02 : 165.41 = 104.03 : x
  2. Step 2: Convert to fraction form
    111.02/165.41 = 104.03/x
  3. Step 3: Cross multiply
    111.02x = 165.41 × 104.03
  4. Step 4: Simplify right side
    111.02x = 17,207.60
  5. Step 5: Solve for x
    x = 17,207.60/111.02
  6. Step 6: Final answer
    x = 155.00

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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.