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Finding the Fourth Proportional to 99,719.12, 137,663.18 and 77,007.12

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Solution

The fourth proportional to 99,719.12, 137,663.18 and 77,007.12 is: 106,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,719.12 : 137,663.18 = 77,007.12 : x
  2. Step 2: Convert to fraction form
    99,719.12/137,663.18 = 77,007.12/x
  3. Step 3: Cross multiply
    99,719.12x = 137,663.18 × 77,007.12
  4. Step 4: Simplify right side
    99,719.12x = 10,601,044,636.81
  5. Step 5: Solve for x
    x = 10,601,044,636.81/99,719.12
  6. Step 6: Final answer
    x = 106,309.05

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