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Finding the Fourth Proportional to 78.02, 116.93 and 26.61

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Solution

The fourth proportional to 78.02, 116.93 and 26.61 is: 39.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.02 : 116.93 = 26.61 : x
  2. Step 2: Convert to fraction form
    78.02/116.93 = 26.61/x
  3. Step 3: Cross multiply
    78.02x = 116.93 × 26.61
  4. Step 4: Simplify right side
    78.02x = 3,111.57
  5. Step 5: Solve for x
    x = 3,111.57/78.02
  6. Step 6: Final answer
    x = 39.88

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