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Finding the Fourth Proportional to 72,297.90, 99,635.87 and 52,120.40

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Solution

The fourth proportional to 72,297.90, 99,635.87 and 52,120.40 is: 71,828.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,297.90 : 99,635.87 = 52,120.40 : x
  2. Step 2: Convert to fraction form
    72,297.90/99,635.87 = 52,120.40/x
  3. Step 3: Cross multiply
    72,297.90x = 99,635.87 × 52,120.40
  4. Step 4: Simplify right side
    72,297.90x = 5,193,061,030.87
  5. Step 5: Solve for x
    x = 5,193,061,030.87/72,297.90
  6. Step 6: Final answer
    x = 71,828.66

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