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Finding the Fourth Proportional to 161,978, 243,005.97 and 51,170

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Solution

The fourth proportional to 161,978, 243,005.97 and 51,170 is: 76,767.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,978 : 243,005.97 = 51,170 : x
  2. Step 2: Convert to fraction form
    161,978/243,005.97 = 51,170/x
  3. Step 3: Cross multiply
    161,978x = 243,005.97 × 51,170
  4. Step 4: Simplify right side
    161,978x = 12,434,615,484.90
  5. Step 5: Solve for x
    x = 12,434,615,484.90/161,978
  6. Step 6: Final answer
    x = 76,767.31

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