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Finding the Fourth Proportional to 120,132.42, 165,783.15 and 65,685.66

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Solution

The fourth proportional to 120,132.42, 165,783.15 and 65,685.66 is: 90,646.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,132.42 : 165,783.15 = 65,685.66 : x
  2. Step 2: Convert to fraction form
    120,132.42/165,783.15 = 65,685.66/x
  3. Step 3: Cross multiply
    120,132.42x = 165,783.15 × 65,685.66
  4. Step 4: Simplify right side
    120,132.42x = 10,889,575,624.63
  5. Step 5: Solve for x
    x = 10,889,575,624.63/120,132.42
  6. Step 6: Final answer
    x = 90,646.44

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