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Finding the Fourth Proportional to 125.85, 188.78 and 47.76

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Solution

The fourth proportional to 125.85, 188.78 and 47.76 is: 71.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.85 : 188.78 = 47.76 : x
  2. Step 2: Convert to fraction form
    125.85/188.78 = 47.76/x
  3. Step 3: Cross multiply
    125.85x = 188.78 × 47.76
  4. Step 4: Simplify right side
    125.85x = 9,015.89
  5. Step 5: Solve for x
    x = 9,015.89/125.85
  6. Step 6: Final answer
    x = 71.64

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