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Finding the Fourth Proportional to 113.03, 155.98 and 61.28

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Solution

The fourth proportional to 113.03, 155.98 and 61.28 is: 84.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.03 : 155.98 = 61.28 : x
  2. Step 2: Convert to fraction form
    113.03/155.98 = 61.28/x
  3. Step 3: Cross multiply
    113.03x = 155.98 × 61.28
  4. Step 4: Simplify right side
    113.03x = 9,558.84
  5. Step 5: Solve for x
    x = 9,558.84/113.03
  6. Step 6: Final answer
    x = 84.57

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