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Finding the Fourth Proportional to 120.08, 180.02 and 74.41

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Solution

The fourth proportional to 120.08, 180.02 and 74.41 is: 111.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.08 : 180.02 = 74.41 : x
  2. Step 2: Convert to fraction form
    120.08/180.02 = 74.41/x
  3. Step 3: Cross multiply
    120.08x = 180.02 × 74.41
  4. Step 4: Simplify right side
    120.08x = 13,395.02
  5. Step 5: Solve for x
    x = 13,395.02/120.08
  6. Step 6: Final answer
    x = 111.55

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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.