Home / 81,072.11-111,847.29-54,172.01

Finding the Fourth Proportional to 81,072.11, 111,847.29 and 54,172.01

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Solution

The fourth proportional to 81,072.11, 111,847.29 and 54,172.01 is: 74,735.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,072.11 : 111,847.29 = 54,172.01 : x
  2. Step 2: Convert to fraction form
    81,072.11/111,847.29 = 54,172.01/x
  3. Step 3: Cross multiply
    81,072.11x = 111,847.29 × 54,172.01
  4. Step 4: Simplify right side
    81,072.11x = 6,058,991,953.12
  5. Step 5: Solve for x
    x = 6,058,991,953.12/81,072.11
  6. Step 6: Final answer
    x = 74,735.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.