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Finding the Fourth Proportional to 138,840.10, 207,968.55 and 76,437.70

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Solution

The fourth proportional to 138,840.10, 207,968.55 and 76,437.70 is: 114,496.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,840.10 : 207,968.55 = 76,437.70 : x
  2. Step 2: Convert to fraction form
    138,840.10/207,968.55 = 76,437.70/x
  3. Step 3: Cross multiply
    138,840.10x = 207,968.55 × 76,437.70
  4. Step 4: Simplify right side
    138,840.10x = 15,896,637,634.34
  5. Step 5: Solve for x
    x = 15,896,637,634.34/138,840.10
  6. Step 6: Final answer
    x = 114,496.01

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