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Finding the Fourth Proportional to 125.77, 189.36 and 111.41

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Solution

The fourth proportional to 125.77, 189.36 and 111.41 is: 167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.77 : 189.36 = 111.41 : x
  2. Step 2: Convert to fraction form
    125.77/189.36 = 111.41/x
  3. Step 3: Cross multiply
    125.77x = 189.36 × 111.41
  4. Step 4: Simplify right side
    125.77x = 21,095.65
  5. Step 5: Solve for x
    x = 21,095.65/125.77
  6. Step 6: Final answer
    x = 167.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.