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Finding the Fourth Proportional to 138,635.70, 207,953.55 and 76,427.70

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Solution

The fourth proportional to 138,635.70, 207,953.55 and 76,427.70 is: 114,641.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,635.70 : 207,953.55 = 76,427.70 : x
  2. Step 2: Convert to fraction form
    138,635.70/207,953.55 = 76,427.70/x
  3. Step 3: Cross multiply
    138,635.70x = 207,953.55 × 76,427.70
  4. Step 4: Simplify right side
    138,635.70x = 15,893,411,533.34
  5. Step 5: Solve for x
    x = 15,893,411,533.34/138,635.70
  6. Step 6: Final answer
    x = 114,641.55

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