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Finding the Fourth Proportional to 159.48, 220 and 101.20

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Solution

The fourth proportional to 159.48, 220 and 101.20 is: 139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.48 : 220 = 101.20 : x
  2. Step 2: Convert to fraction form
    159.48/220 = 101.20/x
  3. Step 3: Cross multiply
    159.48x = 220 × 101.20
  4. Step 4: Simplify right side
    159.48x = 22,264
  5. Step 5: Solve for x
    x = 22,264/159.48
  6. Step 6: Final answer
    x = 139.60

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