Home / 80,968.56-121,439.04-21,791.04

Finding the Fourth Proportional to 80,968.56, 121,439.04 and 21,791.04

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Solution

The fourth proportional to 80,968.56, 121,439.04 and 21,791.04 is: 32,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,968.56 : 121,439.04 = 21,791.04 : x
  2. Step 2: Convert to fraction form
    80,968.56/121,439.04 = 21,791.04/x
  3. Step 3: Cross multiply
    80,968.56x = 121,439.04 × 21,791.04
  4. Step 4: Simplify right side
    80,968.56x = 2,646,282,978.20
  5. Step 5: Solve for x
    x = 2,646,282,978.20/80,968.56
  6. Step 6: Final answer
    x = 32,682.85

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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.