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Finding the Fourth Proportional to 125.19, 187.72 and 38.51

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Solution

The fourth proportional to 125.19, 187.72 and 38.51 is: 57.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.19 : 187.72 = 38.51 : x
  2. Step 2: Convert to fraction form
    125.19/187.72 = 38.51/x
  3. Step 3: Cross multiply
    125.19x = 187.72 × 38.51
  4. Step 4: Simplify right side
    125.19x = 7,228.06
  5. Step 5: Solve for x
    x = 7,228.06/125.19
  6. Step 6: Final answer
    x = 57.74

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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.