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Finding the Fourth Proportional to 125.45, 187.41 and 122.87

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Solution

The fourth proportional to 125.45, 187.41 and 122.87 is: 183.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.45 : 187.41 = 122.87 : x
  2. Step 2: Convert to fraction form
    125.45/187.41 = 122.87/x
  3. Step 3: Cross multiply
    125.45x = 187.41 × 122.87
  4. Step 4: Simplify right side
    125.45x = 23,026.94
  5. Step 5: Solve for x
    x = 23,026.94/125.45
  6. Step 6: Final answer
    x = 183.56

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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.