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Finding the Fourth Proportional to 120,135.79, 165,780.69 and 66,417.67

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Solution

The fourth proportional to 120,135.79, 165,780.69 and 66,417.67 is: 91,652.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,135.79 : 165,780.69 = 66,417.67 : x
  2. Step 2: Convert to fraction form
    120,135.79/165,780.69 = 66,417.67/x
  3. Step 3: Cross multiply
    120,135.79x = 165,780.69 × 66,417.67
  4. Step 4: Simplify right side
    120,135.79x = 11,010,766,331.89
  5. Step 5: Solve for x
    x = 11,010,766,331.89/120,135.79
  6. Step 6: Final answer
    x = 91,652.68

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