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Finding the Fourth Proportional to 115,111.96, 172,692.64 and 65,215.96

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Solution

The fourth proportional to 115,111.96, 172,692.64 and 65,215.96 is: 97,837.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,111.96 : 172,692.64 = 65,215.96 : x
  2. Step 2: Convert to fraction form
    115,111.96/172,692.64 = 65,215.96/x
  3. Step 3: Cross multiply
    115,111.96x = 172,692.64 × 65,215.96
  4. Step 4: Simplify right side
    115,111.96x = 11,262,315,439.07
  5. Step 5: Solve for x
    x = 11,262,315,439.07/115,111.96
  6. Step 6: Final answer
    x = 97,837.93

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