Home / 81,439.56-122,173.92-41,986.08

Finding the Fourth Proportional to 81,439.56, 122,173.92 and 41,986.08

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Solution

The fourth proportional to 81,439.56, 122,173.92 and 41,986.08 is: 62,986.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,439.56 : 122,173.92 = 41,986.08 : x
  2. Step 2: Convert to fraction form
    81,439.56/122,173.92 = 41,986.08/x
  3. Step 3: Cross multiply
    81,439.56x = 122,173.92 × 41,986.08
  4. Step 4: Simplify right side
    81,439.56x = 5,129,603,979.03
  5. Step 5: Solve for x
    x = 5,129,603,979.03/81,439.56
  6. Step 6: Final answer
    x = 62,986.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.