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Finding the Fourth Proportional to 86.86, 129.97 and 62.76

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Solution

The fourth proportional to 86.86, 129.97 and 62.76 is: 93.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.86 : 129.97 = 62.76 : x
  2. Step 2: Convert to fraction form
    86.86/129.97 = 62.76/x
  3. Step 3: Cross multiply
    86.86x = 129.97 × 62.76
  4. Step 4: Simplify right side
    86.86x = 8,156.60
  5. Step 5: Solve for x
    x = 8,156.60/86.86
  6. Step 6: Final answer
    x = 93.91

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