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Finding the Fourth Proportional to 71.76, 98.97 and 42.65

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Solution

The fourth proportional to 71.76, 98.97 and 42.65 is: 58.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.76 : 98.97 = 42.65 : x
  2. Step 2: Convert to fraction form
    71.76/98.97 = 42.65/x
  3. Step 3: Cross multiply
    71.76x = 98.97 × 42.65
  4. Step 4: Simplify right side
    71.76x = 4,220.58
  5. Step 5: Solve for x
    x = 4,220.58/71.76
  6. Step 6: Final answer
    x = 58.82

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