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Finding the Fourth Proportional to 123.03, 168.37 and 120.51

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Solution

The fourth proportional to 123.03, 168.37 and 120.51 is: 164.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.03 : 168.37 = 120.51 : x
  2. Step 2: Convert to fraction form
    123.03/168.37 = 120.51/x
  3. Step 3: Cross multiply
    123.03x = 168.37 × 120.51
  4. Step 4: Simplify right side
    123.03x = 20,289.67
  5. Step 5: Solve for x
    x = 20,289.67/123.03
  6. Step 6: Final answer
    x = 164.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.