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Finding the Fourth Proportional to 99,478.41, 137,278.85 and 54,156.78

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Solution

The fourth proportional to 99,478.41, 137,278.85 and 54,156.78 is: 74,735.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,478.41 : 137,278.85 = 54,156.78 : x
  2. Step 2: Convert to fraction form
    99,478.41/137,278.85 = 54,156.78/x
  3. Step 3: Cross multiply
    99,478.41x = 137,278.85 × 54,156.78
  4. Step 4: Simplify right side
    99,478.41x = 7,434,580,207.32
  5. Step 5: Solve for x
    x = 7,434,580,207.32/99,478.41
  6. Step 6: Final answer
    x = 74,735.62

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