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Finding the Fourth Proportional to 125.64, 173.16 and 120.60

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Solution

The fourth proportional to 125.64, 173.16 and 120.60 is: 166.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.64 : 173.16 = 120.60 : x
  2. Step 2: Convert to fraction form
    125.64/173.16 = 120.60/x
  3. Step 3: Cross multiply
    125.64x = 173.16 × 120.60
  4. Step 4: Simplify right side
    125.64x = 20,883.10
  5. Step 5: Solve for x
    x = 20,883.10/125.64
  6. Step 6: Final answer
    x = 166.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.