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Finding the Fourth Proportional to 127,721.80, 191,582.70 and 81,065.80

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Solution

The fourth proportional to 127,721.80, 191,582.70 and 81,065.80 is: 121,598.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,721.80 : 191,582.70 = 81,065.80 : x
  2. Step 2: Convert to fraction form
    127,721.80/191,582.70 = 81,065.80/x
  3. Step 3: Cross multiply
    127,721.80x = 191,582.70 × 81,065.80
  4. Step 4: Simplify right side
    127,721.80x = 15,530,804,841.66
  5. Step 5: Solve for x
    x = 15,530,804,841.66/127,721.80
  6. Step 6: Final answer
    x = 121,598.70

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