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Finding the Fourth Proportional to 125.45, 173.11 and 76.32

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Solution

The fourth proportional to 125.45, 173.11 and 76.32 is: 105.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.45 : 173.11 = 76.32 : x
  2. Step 2: Convert to fraction form
    125.45/173.11 = 76.32/x
  3. Step 3: Cross multiply
    125.45x = 173.11 × 76.32
  4. Step 4: Simplify right side
    125.45x = 13,211.44
  5. Step 5: Solve for x
    x = 13,211.44/125.45
  6. Step 6: Final answer
    x = 105.31

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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.