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Finding the Fourth Proportional to 74,020.80, 111,045.80 and 21,430.72

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Solution

The fourth proportional to 74,020.80, 111,045.80 and 21,430.72 is: 32,150.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,020.80 : 111,045.80 = 21,430.72 : x
  2. Step 2: Convert to fraction form
    74,020.80/111,045.80 = 21,430.72/x
  3. Step 3: Cross multiply
    74,020.80x = 111,045.80 × 21,430.72
  4. Step 4: Simplify right side
    74,020.80x = 2,379,791,446.98
  5. Step 5: Solve for x
    x = 2,379,791,446.98/74,020.80
  6. Step 6: Final answer
    x = 32,150.31

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