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Finding the Fourth Proportional to 117.71, 176.61 and 56.86

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Solution

The fourth proportional to 117.71, 176.61 and 56.86 is: 85.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.71 : 176.61 = 56.86 : x
  2. Step 2: Convert to fraction form
    117.71/176.61 = 56.86/x
  3. Step 3: Cross multiply
    117.71x = 176.61 × 56.86
  4. Step 4: Simplify right side
    117.71x = 10,041.16
  5. Step 5: Solve for x
    x = 10,041.16/117.71
  6. Step 6: Final answer
    x = 85.31

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