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Finding the Fourth Proportional to 78.95, 109 and 60.57

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Solution

The fourth proportional to 78.95, 109 and 60.57 is: 83.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.95 : 109 = 60.57 : x
  2. Step 2: Convert to fraction form
    78.95/109 = 60.57/x
  3. Step 3: Cross multiply
    78.95x = 109 × 60.57
  4. Step 4: Simplify right side
    78.95x = 6,602.13
  5. Step 5: Solve for x
    x = 6,602.13/78.95
  6. Step 6: Final answer
    x = 83.62

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