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Finding the Fourth Proportional to 84.88, 117.10 and 61.57

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Solution

The fourth proportional to 84.88, 117.10 and 61.57 is: 84.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.88 : 117.10 = 61.57 : x
  2. Step 2: Convert to fraction form
    84.88/117.10 = 61.57/x
  3. Step 3: Cross multiply
    84.88x = 117.10 × 61.57
  4. Step 4: Simplify right side
    84.88x = 7,209.85
  5. Step 5: Solve for x
    x = 7,209.85/84.88
  6. Step 6: Final answer
    x = 84.94

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